Science and Technology

SCIENCE

S e c o n d Q u i m e s t r a l E x a m

Student´s Name: 8vo de E.B.S. “____” Date:

GRADE: _______/100 Teacher´s Name: Juan Francisco García

INSTRUCTIONS:

Before you start, read carefully each instruction. Take your time to answer. Check your spelling and

grammar. The exam is graded over 100 points.

Be sure to write down your full name on the space assign for it. Exams that do NOT have name will be graded as 01/10.

During the test you cannot use any dictionary, electronic devices (except a scientific calculator) and it´s forbidden to ask for any other material.

Live Long and Prosper!

Criteria Assessment: Criteria C: Knowledge & understanding of Science

Achievement Level

IB Level Descriptor Student Friendly language

0 *SBP: Unsatisfactory

The student does not reach a standard described by any of the descriptors given below.

The student does not reach a standard described by any of the descriptors given.

1-2 SBP: Partially Proficient

The student recalls some scientific ideas, concepts and/or processes. The student applies scientific understanding to solve simple problems.

The student recalls some scientific ideas and concepts and uses these to solve simple problems.

3-4 SBP: Proficient

The student describes scientific ideas, concepts and/or processes. The student applies scientific understanding to solve complex problems in familiar situations. The student analyzes scientific information by identifying parts, relationships or causes.

The student describes scientific ideas and concepts and uses scientific understanding to solve complex problems in familiar situations. The student examines scientific information by identifying parts, relationships and causes. The student is able to analyze information that shows understanding.

5-6

SBP: Advanced

The student uses scientific ideas, concepts

and/or processes correctly to construct scientific explanations. The student applies scientific understanding to solve complex problems including those in unfamiliar situations. The student analyzes and evaluates scientific information and makes judgments supported by scientific understanding.

The student uses scientific ideas and

concepts and uses scientific understanding correctly to construct scientific explanations including those in familiar and unfamiliar situations. The student analyzes and evaluates scientific information and makes judgments supported by scientific understanding regarding the reliability of the ideas and the quality of work.

I. IN THE FOLLOWING SECTION, RELATE THE CONCEPTS TO THE CORRECT MEANING. (30 Points Total)

1. In the next table, write down the letter of the concept related to the correct

meaning. (2 points each answer, 30 points total)

CONCEPT MEANING LETTER

1. ATOM A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound

that can take part in a chemical reaction.

2. WEIGHT It is the measure of an object´s mass when gravity is affecting it.

3. VIVIPAROUS Biological process by which a seed gives birth to a

new plant.

4. DENSITY The basic unit of the matter.

5. MATTER An organism that lay eggs outside its body.

6. OVOVIVIPAROUS Everything that has mass and occupies space.

7. STATE Commonly refers to any of three properties of

matter, which have been shown experimentally to be equivalent: Inertial mass, active gravitational mass

and passive gravitational mass.

8. OVIPAROUS Structure that precedes the brain and spinal cord found in vertebrates.

9. MOLECULE Solid and tough structure located inside the body and it´s part of skeleton.

10. MASS Is the change of state from solid to liquid.

11. BONE An organism that lay eggs but its fecundation is

internal and the eggs develop inside the body.

12. MELTING Is the physical form in which a substance exists, such

as a solid, liquid, or gas.

13. PHOTOSYNTHESIS An organism that reproduces without an egg, using a

placenta.

14. GERMINATION The ratio of the mass of a substance to the volume of

the substance.

15. NOTOCHORD Biochemical process that harness sunlight and

transformed it into chemical energy.

II. IN THE FOLLOWING SECTION, SELECT THE CORRECT ANSWER FOR THE NEXT STATEMENTS. (55 Points Total)

3. TRUE OR FALSE. If the statement is True mark it with a T or False with an F. (2 point each answer, 40 points total)

a) All matter has the property of mass, but not all mass is associated with identifiable matter.

b) Solubility is the ability of a substance to dissolve in another substance. c) Fish breathe by gills.

d) A physical property can be ductility.

e) Malleability is a chemical property of the matter. f) Amphibians can only breathe through their skin.

g) The flower has modified leaves called petals that have a green color. h) Chlorophyll is a molecule found in the blood of animals that grabs the

oxygen.

i) Birds developed their feather from the scales of fish. j) The closest relative to birds are the turtles.

k) Ecuador has around 800 species of mammals in their territory.

l) The cartilage is an structure located inside the bones that helps them to become stronger and tougher.

m) A chemical change happens when two or more substances are changed into new substances that have new and different properties.

n) An effervescent tablet in water is an example of physical change.

o) Mammals are only viviparous tetrapod.

p) A tadpole is the first stage of metamorphosis. q) Sublimation is the process to transform solid into gas.

r) The xylem is the only tissue in the plant that can transport water. s) Epiphytes are plants that have roots that attached to the branch of a

tree.

t) Roots present a negative geotropism.

4. MULTIPLE CHOICES. Select the correct answer and make a circle around it. (1 point each answer, 15 points total)

a. What could you use to tell pyrite (fool´s gold) and gold apart? i. Volume ii. Density iii. Mass iv. State

b. What do you think would happen if you placed a nugget of pyrite into a beaker of mercury?

i. The pyrite would sink. ii. The pyrite would dissolve. iii. The mercury and the pyrite will react. iv. The pyrite would float.

c. If a nugget of pyrite and a nugget of gold each have a mass of 50 g, what can you conclude about the volume of each nugget?

i. The volume of pyrite is greater than the volume of gold. ii. The volume of pyrite is less than the volume of gold. iii. The volumes of the substances are equal. iv. There is not enough information to determine the answer.

d. Which substance has the lowest density? i. Helium ii. Pyrite iii. Mercury iv. Gold

e. If you have 150 g of pure gold and the density of gold is 19.32 g/cm3, what is the volume of your gold nugget?

i. 2898 cm3 ii. 7.76 cm3 iii. 0.98 cm3 iv. 0.13 cm3

f. Many soft drinks come in bottles that contain about 590 mL. If the density of a soft drink is 1.05 g/L what is the mass of the drink?

i. 0.0018 g ii. 498.2 g iii. 561.9 g iv. 619.5 g

g. When a substance changes from gas to liquid that is called: i. refraction ii. sublimation iii. condensation iv. precipitation

h. The structure that gives mechanical support to the plant is called: i. Root ii. Leaf iii. Stem iv. Flower

i. The hagfish belongs to the class i. Amphibian ii. Reptile iii. Agnatha iv. Condrytie

j. Sharks, rays and skates are also called: i. Holocephalli ii. Elasmobranchii iii. Sarcopterigii

k. The structure that allows fish to float is called: i. Swim line ii. Swim bladder iii. Gallbladder

iv. Fins l. A plant root has:

i. Leaves ii. Buds iii. Root cap iv. Internodes v. nodes

m. The region protected by the root cap is called: i. Cell Division ii. Cell Elongation iii. Cell Maturation

n. A main characteristics of mammals is that they have: i. Feathers ii. Scales iii. Dendritic scales iv. Fur

o. The leave tissue in charge of doing the photosynthesis is called: i. Cuticule ii. Epidermis iii. Mesodermis iv. Stoma

III. CRITICAL THINKING. IN THE FOLLOWING SECTION ANALYZE AND ANSWER THE FOLLOWING

QUESTIONS. (15 Points Total) 5. In the following table, write down 3 characteristics for Monocots and Dicots (3

Points Total) MONOCOTS DICOTS

6. Fill the following table with the information about the Pollination strategies of the flower plants. (3 Points Total)

STRATEGY 1 STRATEGY 2 STRATEGY 3

7. Classify the following animals in their correct groups. (6 Points Total)

A. _____________ D. ______________________

B. ________________ E. _______________________

C. __________________ F. _________________________

8. Describe the difference between ectothermic and endothermic animals. (3 Points Total)