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Subodh Public School Rambagh Crossing, Jaipur

Sessionn : 2020-21

Class :Flyers 2

Subject :Science

ONLINE ASSIGNMENTS

General Instructions :

1. Solve all assignments on A 4 size sheet which are given after each chapter.

2. Solve Test Paper on April 16, 2020 on A 4 sheet

3. Steps to use Extra Marks App

a. select subject

b. Select Chapter

c. Select learn

d. Detailed Learning

Chapter - 1 : CHEMICAL REACTION AND EQUATIONS [April 03 to 10,2020)

LEARNING OUTCOMES :

The Learner will

1. Be able to classify a chemical reaction as a combination, decomposition, single displacement, double

displacement, or combustion reaction.

2. Be able to predict the products when given a set of reactants for a given Chemical process. .

3. Writes formulas, equations for chemical reaction

April03,2020

Learn following topics form Extra Marks App :

Understanding Concepts

Learning Modules

Introduction

Chemical Reaction

Chemical reaction and chemical equations

Chemical equations

Animation of Chemical equations

Explanation

April04,2020


Balanced Chemical Equation

Information conveyed by Chemical equations

Conservation of mass

Symbols used in Chemical Equations

Subscripts and Coefficients

Advantages of Chemical Equations

Animation of balancing of chemical equation

April 05,2020 : Sunday

April 06,2020 : Mahaveer Jayanti

Revise the topics of April 03 & 04 and learn symbols and valencies of ions and radicles

APRIL 7,2020


Types of Chemical Reaction

Combination Reaction

Examples

Worksheet of an example of combination reaction

Decomposition Reaction

Animation of Decomposition reaction

Decomposition Reaction

Examples of Decomposition Reaction

Characteristics of decomposition reaction

APRIL 8,2020


Thermal Decomposition reaction

Electrolytic decomposition reaction

Animation of electrolysis of water

Photochemical Decomposition reaction

Applications of Decomposition reaction

Displacement Reaction

Examples

Animation of decomposition Reaction

Double Displacement Reaction

Examples

Solve the following work sheet on a 4 size sheet

Q 1 ( a ) A student took 2-3 g of a substance X in a glass beaker & poured water over it slowly. He observed

bubbles along with hissing noise. The beaker becomes quite hot. Identify X. What type of reaction is it?

( b ) Define the type of reaction

Q 2 .A student has mixed the solutions of lead (II) nitrate and potassium iodide.

(i) What was the colour of the precipitate formed? Can you name the compound precipitated ?

(ii) Write the balanced chemical equation for this reaction.

(iii) What type of reaction is it? Define the type of reaction.

Q 3 .( a ) Why are some chemicals and medicine stored in coloured bottles ?

( b ) Why is respiration considered an exothermic process ?

Q4 Define double displacement reaction. Write reaction also.

Q5 You are provided with two containers made up of copper and aluminium.You are also provided with

solution of dilute HCl,dilute HNO3,ZnCl2,H2O.In which of the above containers these solution can be kept.

Q 5(a) A compound `X` is used for drinking, has pH =7.Its acidified solution undergoes decomposition in

presence of electricity to produce gases `Y` and `Z` The volume of Y is double than Z. Y is highly combustible

whereas Z is supporter of combustion .Identify X, Y & Z and write the chemical reactions involved.

( b ) Name and draw the diagram of the above process.

Q 6 ( a ) A pale green substance A in a test tube when heated over the flame of a burner,a brown colored

residue B was formed along with evolution of two gases with burning smell of sulphur .Idetify A & B. Write the

chemical reaction involved. ( b ) Name and define the process

APRIL 9,2020


Oxidation and Reduction Reaction

Oxidation Reaction

Reduction

Modern Concept

Oxidation and Reduction Reaction in everyday life

Corrosion

Rancidity

Retardation of rancidity

April 10,2020 : Good Friday


Q1 . ( a )If oily food is not consumed within a limited time gets stale and gives bed smell and taste. Why ?

( b ) Often preservatives are added to food stuff so they stay consumable for a longer time but preservatives

are chemicals which may be harmful. What alternative do you suggest ?

( c ) What method of preservation of food items should be followed at home ?

Q 2 Define corrosion .Under what conditions does corrosion takes place? Give three examples of corrosion

CHAPTER 6 LIFE PROCESS[April 011 to 23 ,2020)

Learning outcomes

At the end of this unit, students should be able to :

Understand the basis of classifying objects as living and non-living.

Explain what are life processes

Define the term nutrition and describe various modes of nutrition in living beings.

Describe the importance of photosynthesis to living organisms.

Construct the generalized equation of photosynthesis and list the raw materials required for photosynthesis

List various parts of the alimentary canal in humans.

Describe the process of digestion, absorption and assimilation of food across various parts of alimentary canal in

humans. Explain the role of pancreas and liver in digestion

Describe the major steps of respiration in animals and plants List various organs of respiratory system in humans and

the role they play in respiration

Describe the mechanism of transportation of materials in plants List various tissues concerned with transportation of

food materials in plants

Describe the composition, physical characteristics and functions of blood

Describe the cardiac cycle

Describe the nature of excretory wastes produced in our body.

Identify the different parts of the excretory system and describe their functions. Explain the physiology of urine

formation

April 11,2020


Understanding the concepts

Autotrophic nutrition Video

Raw materials required for photosynthesis

Photosynthesis steps

Video

Experiments on raw materials necessary for photosynthesis

April 12,2020 Sunday :

Revise concepts of nutrition

April 13,2020


Mineral nuritents in plants

Heterotrophic nutrition

Types – Saprophytic video

Parasitic ,symbiotic nutrition

April 14,2020:

Prepare track fan of different type of nutrition

April 15,2020


Nutrition in human beings

Structure of alimentary canal ,Video

Working of digestive system ,video

April 16,2020

Do the assessment on A 4 size sheet

SUBODH PUBLIC SCHOOL,RAMBAGH CROSSING,JAIPUR

CLASS: FLYERS 2

SUBJECT: SCIENCE Assessment sheet

(Chemical Reactions and equations)

Time 30 min Marks 20

Section A Tick the correct answer (1x4)

1 Electrolysis of water produces hydrogen and oxygen in the mole ratio of:

( a ) 2:3 ( b ) 1:2 ( c ) 2:1 ( d ) 4 :1

2 Which of the following observation helps us to determine that a chemical change has taken place:

( a ) Change in temperature ( b ) Change in colour ( c) Evolution of a gas ( d ) All of these

3Which of the following are exothermic processes:

( I ) Reaction of water with quicklime (ii) Dilution of an acid

(iii) Evaporation of water ( iv) Sublimation of camphor

( a ) i and ii ( b ) ii and iii ( c ) i and iv ( d) iii and iv

4 Which of the following statement is incorrect about the given reaction

Cu + H2O---------------------- CuO + H2

(a ) Copper is getting oxidized ( b ) Copper is getting reduced

( c) Water is acting as an oxidizing agents ( d ) Water is acting as an reducing agents

Assertion-reason questions (1x2)

The following questions consist of two statements-Assertion (A) and Reason( R). Answer these questions

selecting the appropriate option given below

( a) Both A and R are true and R is the correct explanation of A

( b ) Both A and R are true but R is not the correct explanation of a.

( c ) A istrue but R isfalse

( d ) A is false but R is true

1 Assertion: Brown fumes are produced when lead nitrate is heated

Reason : Nitrogen dioxide gas is produced as a by productue to the decomposition of lead nitrate

2 Assertion : Pungent smelling gas is produced when sulphur burns in air

Reason :Sulphur trioxide is formed on reaction of sulphur with oxygen

Section B

Answer the following questions: (3x3)

1 What do you observe when magnesium ribbon is burnt? Write balanced chemical equation

Also.

2 Define rancidity. Write four methods to prevent Rancidity

3 Why do we store silver chloride in coloured bottle? Define the process.

Section C ( 1x5)

1 ( a ) What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test

tube?

( b ) What type of reaction is this? Write a balanced chemical equation to represent the above action.

April 17 and 18 ,2020


1 The autotrophic mode of nutrition requires

a. Carbon dioxide and water b. Chlorophyll c. Sunlight d. All of the above

2 Which of the following is an example of saprotroph?

a. Grass b. Mushroom c. Amoeba d. Paramecium

3 .Which of the following substances enter a plant tissue through stomata?

a. Water b. Nitrate c. Iron d. Carbon dioxide

4 .Just after photosynthesis, carbohydrate is converted into which of the following?

a. Sucrose b. Starch c. Fructose d. Glucose

Q 5.In which form food is stored in our body.

Q 6.Name the muscle which regulates the exit of food from stomach to small intestine

Q7. Name the protein digesting enzyme secreted by the gastric glands .

Assertion-reason questions





Q8. Assertion (A) :Bile is essential for digestion of lipids.

Reason (R) :Blie juice contains enzymes

Q9 .Assertion (A): Carbohydrate digestion mainly takes place in the small intestine.

Reason(R) : Pancreatic juice contains the enzyme lactase.


Q1. Describe the process of nutrition in amoeba. Draw related diagrams.

Q2.“Simple diffusion is sufficient to meet the requirements of single celled organism but not of multicellular

organism”. Justify the statement

Q3. Write about 3 imp events which take place during photosynthesis.

Q4.‘Light is essential for photosynthesis’. Justify this statement with the help of an experiment

Q5. List two differences between Holozoic and Saprophytic modes of nutrition. Give examples also.

Q6.‘Herbivores have longer small intestine than the carnivores’. Give proper reason.

Q7. How is small intestine designed to absorb digested food?

Q8.How are fats digested in our bodies ?Where does this process takes place.

Q9. Explain the role of the following in the process of digestion in human body a) Saliva bTrypsin c) Lipase d)

bile juice e)) HCl

Q10.Draw a well labeled diagram of alimentary canal .

April 19,2020 Sunday :

Revise concepts of nutrition

APRIL 20,21 2020

Learn following topics form Extra Marks App Respiration

Concept Learning

Respiration

View all videos :

Aerobic and anaerobic Respiration

Respiration in animals

Cellular respiration

An overview of electron transport chain

Respiration in fish

Human respiratory system

Breathing mechanism

APRIL 22,2020


1 What is Breathing?

2 Where does glycolysis occur in the cell?

3 which pathway is common to both aerobic and anaerobic respiration.

4 Why is the rate of breathing different between terrestrial and aquatic animals?

5 How are alveoli of lungs designed to maximize th exchange of gases?

6 How is oxygen and carbon dioxide transported in human beings?

7 Differentiate between: (a ) Aerobic and Anaerobic respiration

(b ) Breathing and respiration

April 23,2020

Learn following topics form Extra Marks App

Transportation in plants (water and minerals )

Video on transportation

Transpiration

Video on transpiration

Transportation of food

Video on translocation of food

APRIL 24,2020

Learn following topics form Extra Marks App

Watch videos on

Components of blood

Blood vessels

Structure of heart

Working of heart

APRIL 25,26,2020

Holiday Revise Nutrition ,respiration and Circulation in plants and animals and solve all the questions

APRIL 27,28,2020


Q1Why it is necessary to separate oxygenated and deoxygenated blood in mammals and birds ? Q2.How is water and minerals transported in plants ? Q3.How is food transported in plants ? Q4. What is double circulation in human beings? Why is it necessary? Q5. List in tabular form, three differences between arteries and veins Q6.Why ventricles have thicker muscular walls than atria ? Q7.How is lymph different from blood plasma ? State 2 functions of lymph Q8.What are the consequences of a deficiency of hemoglobin in our bodies ? Q9.Draw a diagram of the front view of human heart and label any six parts including at least two that are concerned with arterial blood supply to the heart muscles Q10. State the role of the following :-

a) Capillary b) platelets c) Valves in heart d)pulmonary arteries e) pulmonary veins


Q1Which of the following statement (s) is (are) true about heart?

(i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs

(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs

(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts

(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body

(a) (i)

(b) (ii)

(c) (ii) and (iv)

(d) (i) and (iii)

Q2.The blood leaving the tissues becomes richer in

(a) Carbon dioxide

(b) Water

(c) Heamoglobin

(d) Oxygen

Q3.Where does the maximum exchange of material between blood and surrounding cells occur?

a. Heart

b. Veins

c. Arteries

d. Capillaries

APRIL29,2020 Detailed learning Excretion in plants

Video

Excretion in human beings

Watch Videos on

Human kidney

Urine formation

APRIL 30 ,2020


Q1.What are the functions of kidney ?

Q2. Describe the structure and function of nephron

Q3.What is the amount of urine produced regulated ?

Q4.What are the methods used by the plants to get rid of excretory waste?

Q5.What is hemodialysis ? Where is it used ?

Q6.Draw the diagram of the excretory system .

MAY1,2020

Do the following assignment on a 4 size sheet

Draw the well labeled diagrams of the following:

Human Digestive system

Human respiratory system

Human circulatory system

Human excretory system

MAY2,2020

Do the test on A 4 size sheet

CLASS: FLYERS 2

SUBJECT: SCIENCE (life process) Assessment sheet

Time 30 min Marks =20

Each question carries one mark.

Q1.Which part of alimentary canal receives bile from the liver?

(a) Stomach

(b) Small intestine

(c) Large intestine

(d) Oesophagus

Q2.Which is the correct sequence of air passage during inhalation?

(a) Nostrils → larynx → pharynx → trachea → lungs

(b) Nasal passage → trachea → pharynx → larynx → alveoli

(c) larynx → nostrils → pharynx → lungs

(d) Nostrils → pharynx → larynx → trachea → alveoli

Q3.Which of the following statement (s) is (are) true about heart? (i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs (ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs (iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts (iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body (a) (i) (b) (ii) (c) (ii) and (iv) (d) (i) and (iii)

Q4.Oxygen liberated during photosynthesis comes from

(a) water

(b) chlorophyll

(c) carbon dioxide

(d) glucose

Q5.The blood leaving the tissues becomes richer in

(a) carbon dioxide

(b) water

(c) hemoglobin

(d) oxygen

Q6.The internal (cellular) energy reserve in autotrophs is

(a) glycogen

(b) protein

(c) starch

(d) fatty acid

Q7.Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

(a) conversion of pyruvate to ethanol

(b) conversion of pyruvate to glucose

(c) non conversion of glucose to pyruvate

(d) conversion of pyruvate to lactic acid

Q8.Which is the first enzyme to mix with food in the digestive tract?

(a) Pepsin

(b) Cellulase

(c) Amylase

(d) Trypsin

Q9.The opening and closing of the stomatal pore depends upon

(a) oxygen

(b) temperature

(c) water in guard cells

(d) concentration of CO2 in stomata

Q10.Choose the forms in which most plants absorb nitrogen (i) Proteins (ii) Nitrates and Nitrites (iii) Urea (iv) Atmospheric nitrogen (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv)

Q11.What is the significance of emulsification of fats?

Q12.Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?

Q13.Match the terms in Column (A) with those in Column (B)

Q14.Why does absorption of digested food occurs mainly in the small intestine?

Q15.What is the advantage of having four chambered heart?

Q16.Why do veins have thin walls as compared to arteries?

Assertion-reason questions





(c) A is true but R is false


Q17. Assertion : Diffusion does not meet the high energy requirement of multicellular organisms.

Reason:Diffusion is a fast process but only occurs at the surface of the body

Q18.Assertion : Saliva contains pepsin enzyme.

Reason:Pepsin digests lipids.

Q19.Assertion : Rings of cartilage are present in throat.

Reason:These ensure that the air passage does not collapse.

Q20.Assertion : Pyruvate is a six carbon molecule.

Reason: It is a type of protein which has a high affinity for carbon dioxide.

Chapter - 14 : Sources of Energy [May 4 to May 8,2020)

LEARNING OUTCOMES :

The Learner will:

Making efforts to protect the environment eg. Using resources judiciously, making use of non renewable

sources

May 4,2020

Introduction

Good sources of energy

Conventional sources of energy

Fossil Fuels,selection of Fuels,disadvantages

Thermal power plant

Explanation through live virtual classes

May 5,2020

Hydro Energy

Advantages and disadvantages of construction of dams

Biomass,Limitations and Technology improvement

Bio Gas,Construction and working,Importance of Biogas Explanation through live virtual classes

May 6,2020

Wind Energy,Uses

Construction of Wind Mill

Advantages and Disadvantages of wind energy

Non Conventional sources of energy

Solar energy

Advantages, Limitation and applications of solar energy Explanation through live virtual classes

May 7 ,2020

Energy from the sea

Nuclear fission

Nuclear reactor,Principle Explanation through virtual classes

May 8,2020

Nuclear Fusion

Limitation of Nuclear Power generation

Environmental Consequences

Duration of availability of sources Explanation through virtual classes

Must watch the video of EDUMANTRA REVISION CLASS ON SOURCES OF ENERGY after the completion of

chapter


Q1. How is charcoal obtained from wood? Why is charcoal considered better fuel than wood?

.Q2. Describe how hydro energy can be converted into electrical energy. Write any two limitations by

hydro energy.

Q3.What are the disadvantages of using fossil fuel?

Q4.Why the walls of the solar cooker painted black and the top covered with glass?

Q5.Write three limitations of using solar cooker

Q6.What is a solar cell ? write the advantages and disadvantages of using solar cells

Q 7.What is the composition of biogas?Draw Diagram of biogas plant.

Q8. What are the limitations of using wind energy?

Q9. Give one example of a nuclear fusion reaction. Describe one method for making such reactions

possible

Q.10. Name the process used to harness nuclear energy these days.Explain it briefly. List two advantages

of using nuclear energy in place of fossil fuel.

MAY 9,2020

Practice Test

Do the practice test on A 4 size sheet

CLASS: FLYERS 2

SUBJECT: SCIENCE Assessment sheet

(Sources of energy)

Time 30 min

Section A

Tick the correct answer (1x5)

Q 1 Which part of solar cooker is responsible for green house effect:-

( a ) Coating with black colour inside the box ( b ) Mirror

( c ) Glass sheet ( d) Outer cover of the solar cooker

Q 2 Which is the ultimate source of energy:-

( a ) water ( b) Sun ( c ) Uranium ( d ) Fossil Fuel

Q 3 To work properly ,wind electric generators need wind speed of an atleastabout:-

(a) 1.5 Km/h ( b ) 15 km/h ( c ) 150 Km/h (d ) 1.05 Km/h

Q 4 Geothermal energy is feasible in region that:-

( a ) Are near the sea ( b ) have thermal power plants ( c ) have coal mines ( d ) Are over hot spots in the crust

Q 5 To produce biogas in a biogas plant,we need:-

(a ) Air but not water ( b ) water but not air ( c ) air and Water ( d) Neither air nor water

Assertion-reason questions (1x2)





( c ) A istrue but R isfalse


1 Assertion; Charcoal is better fuel then wood for domestic purpose.

Reason : Charcoal burns without flame and does not produce smoke during burning

2 Assertion: Silver metal is used for joining various solar panels

Reason : Silver is a shiny metal

Section B

Answer the following questions: (1X3)

Q1 Nuclear power is an excellent nonconventional source of energystill it is not used commonly for power

generation.Why?

Q 2 Write one advantage and one disadvantage of producing hydroelectricity by building dams on rivers.

Q 3 Why does acid rain happens?

MAY 11,2020

Chapter - 14 : Control and Coordination [May 11 to May 16,2020)

LEARNING OUTCOMES :

The Learner will:

At the end of this unit, students should be able to :

Recognize the need for control and co-ordination in the body of various organisms

Learn about various types of movements that occur in plants

List various plant hormones and discuss about their functions

Identify the components of brain and its functions

Describe the location and structure of spinal cord and recognise its function relating to reflex action

Draw an outline diagram of human body and show the location of various endocrine glands and its functions

Give a brief idea of feedback mechanism in hormonal activity.

Introduction

Nervous system in animals

Neuron and its types

Synapse

Explanation through virtual classes

MAY12,2020

Receptors and its types

Transmissions signals by neuron

Types of neurons

Reflex Arc


MAY13,2020

Parts of brain

Parts of brain and its functions


MAY14,2020:

Endocrine system in humans

Types of glands and their functions

Pituitary gland

Pineal gland

Thyroid gland


MAY15,2020

Adrenal glands

Pancreas

Ovaries

Testes

Disorders of endocrine glands


MAY16,2020

Tropic movements in plants

Role of plant hormones in tropic movements

Types of plant hormones and their functions


Must watch the video of EDUMANTRA REVISION CLASS ON CONTROL AND COORDINATION after the

completion of chapter

MAY17,2020


Q1.What is synapse? In the neuron how is electrical impulse created and what is the role of synapse in it

Q2.State how the accumulation of auxin stimulates the stem to grow on the side of the shoot away from light.

Q3.Write three differences between nervous control and chemical control.

Q4.Name various plant hormones and give their physiological effect on plant growth and development.

Q5.Explain the reflex arc with suitable example.

Q6.Mention one function of each these hormones:

a) Thyroxin b)Insulin c) Adrenaline d) Growth hormone e) Testosterone

Q7.Draw the diagram of brain and label the following parts

Mid brain , pituitary and hind brain

Q8How are involuntary actions and reflex actions different from each other ?

Q9.Why is the flow of signals in a synapse from the axon end to the dendrite end of another neuron but not the

reverse ?

Q10.Differentiate between the tropic and nastic movements in plants.

ASSIGNMENT III

F2

MAY 18,2020

Revise the chapter life process and frame 2 questions based on : 1)Knowledge 2)

Application based.

MAY 19,2020

Life Processes

Q.1. (a) What are the two major types of transport systems in Human beings?

(b) How is food transported in plants? What is this process called? 3

Q.2. List any three major characteristics of lungs which make it an efficient respiratory surface. 3

Q.3. (a) What is the role of mucus in stomach?

(b) Mention any two structural modifications in human small intestine which helps in absorption of food.

3

Q.4. (a) Name the gland associated with kidney. Write the hormone released by it.

(b) What waste materials are removed from the blood in the form of urine by the kidneys?

(c) How is the amount of urine produced by the kidneys is regulated? 3

Q.5. Name the following :

(i) The blood vessel that brings oxygenated blood to the heart.

(ii) The chamber of heart receiving the deoxygenated blood from the body.

(iii) The major blood vessel taking oxygenated blood from the heart to the body. 3

MAY 20,2020

Q.1. Write an activity that shows that CO2 is necessary for photosynthesis. Support your answer with a

diagram of the activity set-up.

Q.2. Write an activity to justify that ‘ The more the surface area the greater will be the rate of absorbtion’.

MAY 25,2020

Revise the chapter “Sources of energy” and frame 2 questions besides the text :1

Understanding 2.Application based.

MAY 26,2020

Sources of Energy

Q1.Give two merits of solar energy.

Q2.What are the limitations of wind energy?

Q3.Why the use of dry wood is not considered as good domestic fuel?

Q4.What are the advantages of nuclear energy. ( 3 Marks )

Q5.State three advantages of solar cooker.

MAY 27,2020

Q1.Collect one image/narrate the incident you have read in news of any region of the world showing how

lockdown has reduced pollution.

JUNE 1,2020

Control & Coordination

Q.1.(a) What are Phytohormones ?

(b) Which plant hormone is present in greater concentration in areas of rapid cell division?

(c) Give one example of plant growth promoter and plant growth inhibitor hormone. 3

Q.2. (a)What is Synapse?

(b) What is the role of synapse?

(c) Name the receptors which detect smell and taste. 3

Q.3. ( a) What is the difference between a reflex action and flying an air craft.

(b) Mention the parts of the brain which:

(i) Maintains the blood pressure of the body.

(ii)Enables us to ride a bicycle.

Q.4 . Write the three points to differentiate between the manner in which the movement takes place in a sensitive

plant and the movement in our legs? 3

Q.5. (a) What type of glands are a working for control and coordination of our body and what are their secretions

called ?

(b) How the release of Adrenaline hormone affects the blood circulation and respiration?

(c) Which gland is responsible for the secretion of growth hormone?

JUNE 2,2020 TEST

Practice Test(Chapter: Control and coordination & Source of energy) MM.=20

Each question carries 1 mark

1. Which is the correct sequence of the components of a reflex arc? (a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord (b) Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle (c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle (d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

2. Which of the following statements are true? (i) Sudden action in response to something in the environment is called reflex action (ii) Sensory neurons carry signals from spinal cord to muscles (iii) Motor neurons carry signals from receptors to spinal cord (iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc

(a) (i) and (ii) (b) (i) and (iii) (c) (i) and (iv) (d) (i) , (ii) and (iii)

3. Which of the following statements are true about the brain? (i) The main thinking part of brain is hind brain (ii) Centres of hearing, smell, memory, sight etc are located in fore brain. (iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain (iv) Cerebellum does not control posture and balance of the body

(a) (i) and (ii) (b) (i), (ii) and (iii)

(c) (ii) and (iii) (d) (iii) and (iv)

4. The growth of pollen tubes towards ovules is due to (a) hydrotropism (b) chemotropism (c) geotropism (d) phototropism

5. What is the correct direction of flow of electrical impulses?

Q6. What is a tropic movement? Explain with an example.

Q7.What will happen if intake of iodine in our diet is low?

Q8.What happens at the synapse between two neurons?

Q9.Answer the following : (a) Which hormone is responsible for the changes noticed in females at puberty? (b) Dwarfism results due to deficiency of which hormone?

Q10.Answer the following : (b) Which gland secretes digestive enzymes as well as hormones? (c) Name the endocrine gland associated with kidneys?

Q11. Choose the correct statement (a) Sun can be taken as an inexhaustible source of energy

(b) There is infinite storage of fossil fuel inside the earth

(c) Hydro and wind energy plants are non polluting sources of energy

(d) Waste from a nuclear power plant can be easily disposed off

Q12. In a hydroelectric power plant more electrical power can be generated if water falls from a greater

height because

(a) its temperature increases

(b) larger amount of potential energy is converted into kinetic energy

(c) the electricity content of water increases with height

(d) more water molecules dissociate into ions

Q13. Choose the incorrect statement regarding wind power

(a) It is expected to harness wind power to minimum in open space

(b) The potential energy content of wind blowing at high altitudes is the source of wind power

(c) Wind hitting at the blades of a windmill causes them to rotate The rotation thus achieved can be

utilised further

d) One possible method of utilizing the energy of rotational motion of the blades of a windmill is to run the

turbine of an electric generator

Q14. Choose the incorrect statement

(a) We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass

fuel

(b) Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen

(c) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual

ash

(d) Bio-mass is a renewable source of energy .

Q15. Why is there a need to harness non-conventional sources of energy? Give two main reasons.

Q16. What steps would you suggest to minimize environmental pollution caused by burning of fossil fuels?

Q17.What is the role of a plane mirror and a glass sheet in a solar cooker?

Q18. Mention 2 advantages of a solar cell?

Q19. What are the limitations in obtaining energy from wind?

Q20.Mention 2 major components of biogas.

JUNE 3,2020

Control and Coordination

Q. 1. Do an experiment to find out the speed of action taken in

(a) a person suddenly touches a hot plate

(b) same person answer the question asked

(c) Response of a touch-me-not plant towards a pebble thrown on it

Write what do you conclude and draw as inference from this activity.

Q.2.Write an activity to show show hydrotropic movements in plants. Draw the well labeled diagram for

the same.

JUNE 8,2020

Revision of all the reactions of chapter: Chemical equations and reactions .

JUNE 9,2020

• Open the given link https://www.youtube.com/watch?v=_ AiYmM1OTJI&feature=youtu.be

Watch the video carefully, you can see many reactions taking place in the video. Pause the video after

each reaction and translate each reaction into chemical equation and then balance it.

• Open the given link https://nroer.gov.in/55ab34ff81fccb4f 1d806025/page/5b1e12bf16b51c01dc 2f95c3

This is an interactive image based on experimental setup. Write the balanced chemical equation for the

same. Have fun with your friends. Develop

a crossword puzzle based on chemical reactions. Share with your friends on Whatsapp group. Give

at least half an hour to complete and then discuss with them the key along with reasons.

Identify and note at least ten chemical reactions taking place in your home/ kitchen and give reasons

for the same. You can discuss about them with your parents or friends on Google group/ WhatsApp

group, etc.

JUNE 10,2020

Develop a game using cards (cards you can make from thick sheets of paper). Write symbols of

elements, formulae, valencies and names of various reactions on different cards.These cards can be

used for learning balancing of chemical equations and also in classifying chemical reactions.

You can make video of this game and share with your friends. You can also play the game with your

classmates ones your school reopens.

Take grape juice, lemon juice, orange juice, soap solution, baking soda solution separately in

different containers. You may also take solutions available at your home. Dip one shining iron nail.

in each of these solutions and keep one nail for comparison.

Record your observations for a week or so on the basis of following:

Change in physical apperance of the nails

Change in the appearance of the solutions

Identify the changes as physical or chemical with reasons.

You can also draw diagram of this experimental setup.

JUNE 15,2020

Write the balanced equations for the following chemical reactions –

1. HNO3 +Ca(OH)2 → Ca(NO3)2 + H2O

2. BaCl2 + Al2(SO4 )3 → BaSO4 + AlCl3

3. Zinc + Silver nitrate → Zinc nitrate + Silver

4. Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

https://www.youtube.com/watch?v=_AiYmM1OTJI&feature=youtu.be

https://www.youtube.com/watch?v=_AiYmM1OTJI&feature=youtu.be

https://nroer.gov.in/55ab34ff81fccb4f1d806025/page/5b1e12bf16b51c01dc2f95c3



https://www.toppr.com/guides/chemistry/hydrogen/water/

5. C5H12 + O2 ---> CO2 + H2O.

6. . Zn + HCl ---> ZnCl2 + H2 .

7. . Ca(OH)2 + H3PO4 ---> Ca3(PO4)2 + H2O.

8. FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl.

9. S8 + F2 ---> SF6 .

10. C2H6 + O2 ---> CO2 + H2O.

11. Al2(CO3)3 + H3PO4 ---> AlPO4 + CO2 + H2O.

subodh public school€¦ · q1. describe the process of nutrition in amoeba. draw related...

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