9th grade Fizx

Unit-1 Nature ofPhysics

1.1 The Science of Physicspage - 19

Solutions

condensed matter physics

nuclear physics

9th grade Fizx

Unit-1 Nature ofPhysics

1.1 The Science of Physicspage - 19

Solutions

thermodynamics

electricity & magnetism

optics

mechanics

optics

9th grade Fizx

Unit-1 Nature ofPhysics

1.1 The Science of Physicspage - 19

Solutions

electricity & magnetism mechanics

mechanics nuclear physics

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 23

Solutions

D

C

F

A

E

B

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 23

Solutions

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 24

Solutions

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 24

Solutions

The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not."

"If sea water has salt in it, it will freeze at a lower temperature than fresh water."

9th Grade Physics Workbook METU Development Foundation High School 5

4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh

water, b. Dissolves 35 grams of table salt in one of the

beakers, c. Places both beakers in a freezer at a

temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?

5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.

Conclusion (1)

Data & Observations

(2)

Experiment (3)

Hypothesis (4)

Problem (5)

Research (6)

_____ A scientist wants to know: “Does the

temperature of water change how much sugar will dissolve in it?”

_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.

_____ He decides that more sugar will dissolve in the water if it is hotter.

_____ He prepares five different beakers of water at different temperatures.

_____ He adds sugar to each of the beakers until no more will dissolve.

_____ He then carefully measures and records how much sugar was added to each beaker.

_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.

In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?

The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity.

9th Grade Physics Workbook METU Development Foundation High School 5

4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh

water, b. Dissolves 35 grams of table salt in one of the

beakers, c. Places both beakers in a freezer at a

temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?

5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.

Conclusion (1)

Data & Observations

(2)

Experiment (3)

Hypothesis (4)

Problem (5)

Research (6)

_____ A scientist wants to know: “Does the

temperature of water change how much sugar will dissolve in it?”

_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.

_____ He decides that more sugar will dissolve in the water if it is hotter.

_____ He prepares five different beakers of water at different temperatures.

_____ He adds sugar to each of the beakers until no more will dissolve.

_____ He then carefully measures and records how much sugar was added to each beaker.

_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.

In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?

The scientist goes the laboratory and does the following:

a. Fills each of two beakers with one liter of fresh water,

b. Dissolves 35 grams of table salt in one of the beakers,

c. Places both beakers in a freezer at a temperature of -1 °C,

d. Leaves the beakers in a freezer for 24 hours.

9th Grade Physics Workbook METU Development Foundation High School 5

4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh

water, b. Dissolves 35 grams of table salt in one of the

beakers, c. Places both beakers in a freezer at a

temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?

5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.

Conclusion (1)

Data & Observations

(2)

Experiment (3)

Hypothesis (4)

Problem (5)

Research (6)

_____ A scientist wants to know: “Does the

temperature of water change how much sugar will dissolve in it?”

_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.

_____ He decides that more sugar will dissolve in the water if it is hotter.

_____ He prepares five different beakers of water at different temperatures.

_____ He adds sugar to each of the beakers until no more will dissolve.

_____ He then carefully measures and records how much sugar was added to each beaker.

_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.

In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?

A scientist wants to find out why seawater freezes at a lower temperature than fresh water.

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 24

Solutions

5

6

4

3

3

2

1

Water at different temperatures.

Amount of sugar that will dissolve in the water.

The amount of water.

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 27

Solutions

9th Grade Physics Workbook METU Development Foundation High School 6

1.2 SCIENTIFIC METHOD Activity – 1.2.2

Observation & Experiment (Variables) 1. Determine the following statements whether they are qualitative or quantitative observations If it is QUALITATIVE, print “QL”. If it is QUANTITATIVE, print “QN”.

______ a) Your cell phone rang for 6 times.

______ b) I bought 4kg of tomatoes yesterday.

______ c) The wind is blowing very strong due southwest.

______ d) There are 20 minutes left to the end of this exam.

______ e) Classroom is really cold today. 2. Read the following examples and then decide if each is either qualitative (QL) or quantitative (QN). _______ a) The candy was sour. _______ b) The wing of the bug is 5 cm long. _______ c) That iPod is white. _______ d) The mass of the beaker was 122 g. _______ e) The door chime rings several times.

3. Choose the best answer and encircle its letter. a) Mr. Erkoç Torun wanted to see how different

types of music affected students' pulse rates. He played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music.

Identify the dependent variable. A) Classical music resulted in the highest pulse

rate. B) Mr. Erkoç Torun. C) Types of music. D) High pulse rate. E) Pulse rate. b) Zeynep wanted to see how high an ice cube

would float in different temperatures of water. Identify the independent variable. A) Size of ice cube. B) Temperature the ice cube was at its' highest

height. C) Temperature of water. D) Amount of water. E) Height of ice cube. c) Duygu was investing how fast it took Efecan to

react to different sounds. Identify the dependent variable. A) How much time it took Efecan to react. B) How fast the sounds are played. C) Playing the trumpet over and over. D) Efecan. E) Different sounds. d) Arda studied how far water would spurt out of

a plastic milk carton when holes were punched at different heights from the bottom of the container.

Identify the controlled variable. A) Distance water traveled out of carton. B) Water. C) Sizes of holes. D) Different heights of holes in container. E) The total height of the container. e) Problem: Do cars using diesel fuel get more

distance than cars using gas? Identify the independent variable. A) distance traveled. B) type of fuel. C) car model. D) amount of fuel. E) driver.

QN

QN

QL

QN

QL

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 27

Solutions

QL

QL

QN

QN

QL

2.

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 27

Solutions

3.

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 28

Solutions

What is the effectiveness of various metals in preventing rusting?

If we place various metals into water, metals will rust in different amounts.

The types of metals.

How much the nails rusted.

Amount of water in the tubes, amount of metals, and the same type of iron nail.

4.

9th grade Fizx

Unit-1 Nature ofPhysics

1.2 Scientific Methodpage - 28

Solutions

How does the mass of the toy car released from the top of the ramp affect the distance traveled by the car after it reaches the bottom of the ramp?

The mass of the toy car cannot have any effect on the horizontal distance that the car travels until it stops.

The mass of the toy car.

The horizontal distance traveled by the car until it stops.

The height of the ramp.

5.

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 43

Solutions

basic

basic

basic

basic

derived

derived

basic

basic

derived

derived

derived

derived

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 43

Solutions

Mass

Time

Length

ampere

kelvin

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 43

Solutions

420000

10

0,07

560000

1,88.109

0,00043

103

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 43

Solutions

0,4

15

200

120

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 43

Solutions

W

C

C

C

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 44

Solutions

poor accuracy & good precision

good accuracy & good precision

poor accuracy & poor precision

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 44

Solutions

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 44

Solutions

D

G

F

A

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 44

Solutions

W

C

C

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 44

Solutions

Absolute error = 10,22-10,00=0,22 g

Percent error =(0,22/10,00).100

Percent error =2,2 %

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 45

Solutions

scalar

scalar

scalar

scalar

vector

vector

vector

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 45

Solutions

scalar

scalar

scalar

scalar

vector

vector

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 45

Solutions

equal to

opposite

equal

line of action

perpendicular

zero

9th grade Fizx

Unit-1 Nature ofPhysics

1.4 Measurement & Units page - 45

Solutions