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Science Form 3

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

Which reaction explains about exothermic reaction?

a)

Heat is absorbed from the surroundings

b)

Surrounding temperature increases

c)

Heat energy is changed to chemical energy

d)

Thermometer reading decreases

2.

Which statement is correct about endothermic reaction?

a)

Heat is released

b)

Thermometer reading increases

c)

Surrounding temperature increases

d)

Breaks the chemical bonds of the reactant

3.

Respiration is an exothermic reaction.

Which of the following explains about the process?

a)

Release heat to the environment

b)

The chemical bond in glucose is broken down

c)

Heat energy is changed to chemical energy

d)

Forming water as byproduct

4.

Which process does not involve the release of heat energy?

a)

The combustion of petrol

b)

The formation of ice

c)

Volcano eruption

d)

Melting of butter

5.

The diagram shows the bread dough is put into an oven to be baked.

Which statements are correct about the baking process?

Choose more than one answer.

a)

Endothermic reaction occurs

b)

The heat from the oven is absorbed by the dough

c)

Thermal equilibrium achieved when the bread is cooked

d)

The formation of new substance did not occur

6.

The diagram shows sublimation process that occurs in dry ice.

This process is endothermic. Why?

a)

New substance is formed

b)

There is a conversion of energy

c)

Dry ice absorbs heat from surroundings

d)

The water vapour formed is very cold.

7.

Endothermic is a reaction that absorbs heat.

a)

TRUE

b)

FALSE

8.

Breaking the chemical bond releases energy.

a)

TRUE

b)

FALSE

9.

What happens when heat energy is absorbed?

a)

Bond formation occurs

b)

Exothermic reaction

c)

Bond breakage occurs

d)

No change occurred

10.

The diagram shows the set - up of apparatus for an experiment.

Which of the following statements is true about the reaction that occurred in the experiment?

a)

Temperature of water increases

b)

Heat energy is absorbed from the environment

c)

Exothermic reaction occurs

d)

Heat energy is released during reaction

11.

How can we identify that the absorption of heat has occurred?

a)

The surrounding temperature increases

b)

The surrounding temperature decreases

c)

The container will heat up

d)

No change occurs

12.

The diagram shows a chemical reaction.

The initial temperature of distilled water is 27⁰C.

What temperature may be recorded by the thermometer in the sodium hydroxide solution?

a)

35⁰C

b)

20⁰C

c)

18⁰C

d)

10⁰C

13.

Which of the following is an endothermic reaction?

a)

Photosynthesis

b)

Respiration

c)

Burning of dried leaves

d)

Neutralisation

14.

What is the use of hot pack?

a)

Treating swelling

b)

Cure fever

c)

Relieve joint pain

d)

Relieve inflammation

15.

Choose the tools that apply the concept of thermochemistry reactions.

a)
b)
c)
16.

Energy cannot be

a)

created

b)

played

c)

talked

d)

changed

17.

Energy can only ( ) its form.

a)

create

b)

destroy

c)

change

d)

grab

18.

When gravitational potential energy maximum, kinetic energy

a)

maximum

b)

minimum

c)

zero

d)

no change

19.

When kinetic energy maximum, gravitational potential energy

a)

maximum

b)

minimum

c)

zero

d)

no change

20.

Gravitational potential energy increases, kinetic energy

a)

increases

b)

decreases

c)

no change

d)

zero

21.

When elastic potential energy maximum, kinetic energy

a)

maximum

b)

minimum

c)

zero

d)

no change

22.

When kinetic energy maximum, elastic potential energy

a)

maximum

b)

minimum

c)

zero

d)

no change

23.

When elastic potential energy increases, kinetic energy

a)

increases

b)

decreases

c)

zero

d)

no change

24.

Formula of gravitational potential energy

a)

12Fx\frac{1}{2}Fx

b)

mgh

c)

12mv2\frac{1}{2}mv^2

d)

12F\frac{1}{2}F

25.

Formula of kinetic energy

a)

mgh

b)

12Fx\frac{1}{2}Fx

c)

12mv2\frac{1}{2}mv^2

d)

12F\frac{1}{2}F

26.

Which of the following is a physical factor involved in homeostasis?

a)

The osmosis pressure

b)

The level of sugar in the blood

c)

The change in the body temperature

d)

The change in the water content of the body

27.

Which of the following can regulate water in the plant?

a)

Diffusion

b)

Transpiration

c)

Respiration

d)

Photosynthesis

28.

Diagram shows two students doing exercise. What happens to their body temperature after exercise?

a)

Increase

b)

Decrease

c)

Remains the same

d)

Continues to increases

29.

Which of the following activity shows the fastest pulse rate?

a)
b)
c)
d)
30.

Which of the following statements is the best to explain the need for homeostasis to the organism ?

a)

Avoid sudden death

b)

Maintain constant body temperature

c)

Ensure that all enzymes involved in chemical reactions work well

d)

Provides optimum internal environment for efficient metabolic activity

31.

Shivering in the cold produces heat in the body.

a)

True

b)

False

32.

What is the corrective mechanism occurred when body temperature decrease from the normal ?

a)

Sweating

b)

Hair bends

c)

Blood vessels will contract

d)

The skeletal muscles are not active

33.

What body system is involved in the correction mechanisms experienced by Suzana when her body releases more sweat?

a)

Excreation system

b)

Blood circulatory system

c)

Digestive system

d)

Respirotary system

34.

Which of the following helps in the regulation of body temperature?

a)

Brain

b)

Lung

c)

Stomach

d)

Liver

35.

Which of the following helps in the homeostasis control process?

P - Organ

Q - Endocrine glands

R - Muscles

S - Nerve

a)

P, Q and R only

b)

P, R and S only

c)

Q, R and S only

d)

P, Q, R and S

36.

Which of the following organisms can maintain body temperature, even though the temperature in the surroundings changes significantly?

a)

Toad

b)

Crocodile

c)

Fish

d)

Elephant

37.

Which of the following is the best situation to take an animal's respiratory rate?

a)

When the animal is asleep

b)

As soon as the animal wakes up

c)

When the animal is calm and awake

d)

When the animal has just been exercised

38.

Homeostasis does not occur in plants

a)

True

b)

False

39.

During the day, stoma __________to enable more water to be evaporated from the leaves through transpiration.

a)

opens

b)

closes

40.

What is the process by which plants lose water?

a)

Evaporation

b)

Transpiration

c)

Regulation

d)

Absorption

41.

Human nervous system. Label A.

a)

Brain

b)

Spinal cord

c)

Cranial nerves

d)

Spinal nerves

42.

Human nervous system. What is B?

a)

Brain

b)

Spinal cord

c)

Cranial nerves

d)

Spinal nerves

43.

Human nervous system. What is C?

a)

Brain

b)

Spinal nerves

c)

Cranial nerves

d)

Spinal cord

44.

Human nervous system. What is D?

a)

Brain

b)

Spinal nerves

c)

Cranial nerves

d)

Spinal cord

45.

What is labeled Z?

a)

Nervous system

b)

Central nervous system

c)

Peripheral system

d)

Peripheral nervous system

46.

What is labeled Y?

a)

Nervous system

b)

Central nervous system

c)

Peripheral system

d)

Peripheral nervous system

47.

The human nervous system is able to detect ______________.

a)

rsponses

b)

stimuli

c)

impulses

d)

information

48.

Human nervous system send _________________ in the form of __________________.

a)

responses, impulses

b)

information, impulses

c)

stimuli, impulses

d)

fear, impulses

49.

A human nervous system can produce an appropriate _____________.

a)

answers

b)

responses

c)

interpretation

d)

stimuli

50.

Voluntary actions are taken under _________________ control.

a)

conscious

b)

unconscious

c)

semi-conscious

d)

caution

51.

Involuntary actions are taken under _________________ control.

a)

conscious

b)

unconscious

c)

semi-conscious

d)

caution

52.

Example of involuntary action is ____________________.

a)

reading

b)

talking

c)

breathing

d)

writing

53.

Example of voluntary action is ____________________.

a)

peristalsis

b)

heartbeat

c)

breathing

d)

reading

54.

Which one below is CORRECT in describing voluntary action?

a)

Affector > brain > effector > response

b)

Affector > effector > response

c)

Affector > effector > spinal cord > response

d)

Effector > Affector > spinal cord > response

55.

Which one below is CORRECT in describing involuntary action?

a)

Affector > brain > effector > response

b)

Affector > effector > response

c)

Affector > effector > spinal cord > response

d)

Effector > Affector > spinal cord > response

56.

In an experiment, when a torch is shined towards a student's eye, the pupil will become smaller.

Explain the sequence on the pathway of this impulse?

a)

Affector > brain > effector > response

b)

Affector > brain > effector

c)

Affector > effector > response

d)

Affector > effector > spinal cord > response

57.

What is the response in the above activity?

a)

catching the ruler

b)

voluntary action

c)

release the ruler

d)

involuntary action

58.

The above experiment shows ______________ action and is done _________________.

a)

voluntary, consciously

b)

voluntary, unconsciously

c)

involuntary, consciously

d)

involuntary, unconsciously

59.

Response is very important in our lives so that we can _____________________.

a)

coordinate our brain during certain time only.

b)

coordinate and control body organs to function efficiently in the time required.

c)

coordinate study, resting and sleeping time.

d)

to protect ourselves from harms.

60.

The figure above explains a pathway of impulse in human nervous system during hot object experiment. This pathway explains ____________________.

a)

a voluntary action

b)

an involuntary action

c)

a reflex anatomy

d)

a relation between stimuli and response

61.

A damaged nervous system can cause a person to ____________________.

a)

become disabled

b)

face difficulties in life

c)

have problem in breathing

d)

become partially or completely paralysed

62.

Which is the uppermost layer of the atmosphere of Sun

a)

Chromosphere

b)

Photosphere

c)

Corona

d)

Core

63.

What is A

a)

Corona

b)

Convection Zone

c)

Radiation Zone

d)

Core

64.

What is B

a)

Corona

b)

Convection Zone

c)

Radiation Zone

d)

Core

65.

What is C

a)

Corona

b)

Convection Zone

c)

Radiation Zone

d)

Core

66.

What is D

a)

Corona

b)

Chromosphere

c)

Photosphere

d)

Atmosphere

67.

What is E

a)

Corona

b)

Chromosphere

c)

Photosphere

d)

Atmosphere

68.

What is F

a)

Corona

b)

Chromosphere

c)

Photosphere

d)

Atmosphere

69.

•The dark regions seen on the surface of the Sun.

a)

Prominence

b)

Sunspot

c)

Solar flare

d)

Granule

70.

•Is huge loop or arched column of glowing gases over the sunspot

a)

Prominence

b)

Sunspot

c)

Solar flare

d)

Granule

71.

•Is a column of large amounts of charged gases erupting from the Sun

a)

Prominence

b)

Sunspot

c)

Solar flare

d)

Granule

72.

•Particles in plasma such as electrons, protons and alpha particles that erupt form the sun to outer space travel together at high speeds known as ________.

a)

Prominence

b)

Solar cycle

c)

Solar wind

d)

Granule

73.

How long is solar cycle last for?

a)

11years

b)

11days

c)

12years

d)

12days

74.

•the region of space surrounding Earth where the dominant magnetic field is the magnetic field of Earth, rather than the magnetic field of interplanetary space.

a)

Earth's magnetic field

b)

Earth megnetosphere

c)

Coronal mass ejection

d)

Solar wind

75.

Following is the Importance of Earth’s Magnetosphere, except

a)

functions as a biological shield to protect life on Earth

b)

blocks charged particles such as electrons, protons and alpha particles in the solar wind from reaching Earth.

c)

reduces the pressure exerted by solar wind on Earth’s atmosphere

d)

disrupt

telecommunication, navigation system and electric power lines

76.

The Sun consists almost entirely of which two types of gases?

a)

Helium

hydrogen

b)

Helium 

Oxygen

c)

Hydrogen 

Oxygen

d)

Hydrogen 

Carbon dioxide

77.

Which of the following shows work done?

a)

Pushing a wall

b)

Sitting on the floor

c)

Rowing a boat

d)

Reading a book in the class

78.

Table shows the mass of four different loads which are being pushed in a trolley over a distance of 5m. Which of the following statements is correct.

a)

The work done by the trolley for load P is the biggest.

b)

The work done by the trolley for load R is the smallest.

c)

The work done by the trolley for load S is greater than for load Q.

d)

The work done by the trolley for load Q is smaller than for load P.

79.

How to calculate work done?

a)

Force (N) X Displacement (m)

b)

Force (N) X Time (s)

c)

Time (s) X Displacement (m)

80.

What is the SI unit of work done?

a)

Watt (W)

b)

Meter per second (m/s)

c)

Joule (J) or Newton meter (Nm)

d)

kg m

81.

Diagram shows the sack of rice being pushed over a distance of 5m. Calculate the work done.

a)

6J

b)

60J

c)

150J

d)

1500J

82.

Diagram shows Mary is rowing a boat. Calculate the distance travelled by the boat if the work done is 1500 J.

a)

0.02 m

b)

30 m

c)

1450 m

d)

75000 m

83.

The work done by Ali to push a trolley for a distance of 30 m is 600 J. Calculate the force applied.

a)

0.05 N

b)

20 N

c)

570 N

d)

18000 N

84.

The table shows the mass of four students who are asked to carry loads of different mass up a flight of stairs with a height of 5m. Who does the most work?

a)

Ali

b)

Abu

c)

Azman

d)

Akil

85.

How to calculate power?

a)

Work X time

b)

Worktime\frac{Work}{time}

c)

timework\frac{time}{work}

86.

What is the SI unit for power?

a)

Joule (J)

b)

Watt (W)

c)

Newton meter (Nm)

d)

Volt (V)

87.

A 200 N weight is lifted by Mazlan to a height of 1.5 m in 3 seconds. Calculate the power needed to lift the weight.

a)

100 W

b)

300 W

c)

600 W

d)

900 W

88.

A stuntman with a mass of 60kg had climbed up the roof of a building whihc is 50m tall. If the power used for this stunt is 6000 w, calculate the time take by the stuntman to complete this stunt.

a)

0.5 s

b)

1.2 s

c)

2 s

d)

5 s

89.

Bobby pushes his toy box across the room. What kind of energy is happening?

a)

sound

b)

light

c)

electrical

d)

mechanical

90.

Lillian turns on her desk lamp to read her book. Which of the following describes what is occurring in order for the lamp to produce light?

a)

the circuit is opened, turning the light off

b)

the circuit is closed, turning the light off

c)

the circuit is opened, turning the light on

d)

the circuit is closed, turning the light on

91.

Caroline is making a poster about conductors and insulators. All of the following objects would be considered conductors, except

a)
b)
c)
d)
92.

Which form of energy is produced by the light bulb when a lamp is turned on?

a)

sound energy

b)

electrical energy

c)

light energy

d)

chemical energy

93.

An insulator is often used to help regulate an object’s temperature. Which of the following is true about

an insulator?

a)

it slows energy transfer

b)

it can also be a good conductor

c)

it allows heat to pass through easily

d)

it provides heat to keep materials warm

94.

Lola is learning to play the guitar. Which form of energy is produced when she plucks the strings and

they vibrate?

a)

electrical energy

b)

thermal energy

c)

light energy

d)

sound energy

95.

Look at the drawing of the electrical circuit and determine which of the following statements is true

about the circuit?

a)

The light bulb is on

b)

The electrical circuit is working

c)

The electrical circuit is open

d)

The electrical circuit is closed

96.

Marcus wants to create a circuit. He has a battery and a light bulb. Which of the following items would

work best to complete his circuit and produce light?

a)
b)
c)
d)
97.

The diagram below shows a wind turbine. Electricity is generated when the blades of the turbine rotate. What kind of energy is happening when the turbine rotates?

a)

electrical energy

b)

light energy

c)

thermal energy

d)

mechanical energy

98.

Sam tries to build an electric current using a battery, a light bulb, a paper clip, and copper wire. She

wants to demonstrate that an electric circuit travels in a closed path. The diagram shows what

she builds. Which statement explains the problem with her circuit?

a)

The circuit lacks an energy source.

b)

The circuit lacks a wire connecting the bulb to the battery.

c)

The light bulb uses the electric current.

d)

The paper clip stops the electric current.

99.

In the diagram, what vocabulary word should be labeled at #2?

a)

copper wire

b)

load

c)

positive terminal

d)

power source

100.

Which of the following is a good conductor of thermal and electrical energy?

a)

glass

b)

wood

c)

rubber

d)

copper

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