Heat Paper 1

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Science Form One

Heat

PAPER 1

Instructions : Each question is followed by four possible answers A, B, C and D. Choose thecorrect answer.

1. What will happen to an object when heat is supplied to it?A It becomes hot and its temperature rises

B It becomes cold and its temperature drops

C No changesD It contracts and its temperature drops

2. Land breeze blows whenA Sea is cooler than the land

B Sea and the land are at the same temperature

C Sea is hotter than the land

D Sun sets

3.

The above diagram shows ice cubes at the bottom of a boiling tube not melting although the

Water at the top is boiling. This experiment shows that

A water is a poor conductor of heatB the wall of the boiling tube conducts heat away fast

C heat is transferred by convection

D wire gauze conducts heat away fast

4. Transfer of heat through conduction in a solid can be explained by

A chemical theoryB kinetic theory of gas

C kinetic theory of particle

D heat theory

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5.

The diagram above shows a model of a ventilation system of a house. R and S represent two

openings in the house. What must be done to make the temperature in the house to drop to

its lowest level?

6. Among the following materials, which is the best conductor of heat?

A Copper

B WoodC Carbon

D Iron

7. __________ is a process of heat transfer through particle movement from a warmer place

to a cooler place in fluid such as liquid or gas.

A ConvectionB Conduction

C Radiation

D Insulation

8.

The diagram above shows an air ventilation device. It is usually fixed on the roof so that

A cold air can be drawn inB cold air which is more dense is drawn out

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C hot air which is less dense is drawn in

D the spinning caused by the wind draws out the hot air

9. Which of the following shows the application of good insulator of heat?

A Copper metal is used to make heating coilB Hot water pipe is wrapped with glass wool

C Wire gauze is made of iron

D Wok and pot are made from aluminum

10.

The diagram above shows two flasks X and Y of different sizes filled with hot water at 100

C. Among the following, which is the correct temperature versus time graph for water inX and Y?

11. Ice cream is wrapped with paper to delay it from melting. What is your reason?

A Paper is a poor conductor of heat

B Paper can absorb heat wellC Paper is a good radiator of heat

D Paper can absorb the melted ice

12. A wooden clip is used to hold a test tube during heating. This is to prevent heat being

transferred to the hand through the process ofA conduction

B conduction and convection

C conduction and radiation

D radiation

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13.

What substance may possibly contain such particles?

A Water

B OxygenC Zinc

D Mercury

14.

What kind of air movement takes place in the diagram above?

A Land breeze

B Southern windC Northern wind

D Sea breeze

15. Why is a wok made of good conductor of heat?

A So that the wok will be of good quality

B So that the wok will not easily rustC So that the wok becomes light and easy to hold

D So that heat from the fire will be quickly transferred to the food being cooked

16.

The diagram above shows four beakers containing different quantities of water with differenttemperatures. Water in which beaker has the lowest temperature of heat?

A PB Q

C R

D S

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17. Plants cool their leaves on a hot day through the process of

A photosynthesis

B excretionC breathing

D transpiration

18.

In the diagram above, most of the heat from the water is lost throughA convection and radiation

B radiation, conduction and convectionC convection and conduction

D radiation only

19. The wall of a building heated by sunlight loses its heat at night through the process of

A convection, radiation, and conductionB convection and radiation

C convection and conduction

D convection only

20.

The diagram above shows a building with two windows M and N and two air vents K and L.Among the openings K, L, M, and N, which allows air to flow in and which allows the air

to flow out?

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21. There is a process of heat transfer that occurs from one heat source to its surrounding area

without any medium. In which of the following situations does this heat transfer occur?

I Heat from fire reaches your faceII Land breeze

III Ventilation in a house

A I only

B I and II only

C II and III onlyD I, II, and III

22.

What causes the formation of sea breeze during the daytime in the diagram above?

I Cool air from the land moves to replace warm air at the sea

II Land becomes warmer than the sea

III Air moves from the sea to the land

A I only

B I and II onlyC II and III only

D I, II, and III

23. Which the following situations is true concerning absorption and radiation of heat?

I Oil tank is painted with aluminum paint to reduce the absorption of heat

II Heat from the sun reaches us by radiation

III Radiator coil of a car is painted black to increase the radiation of heat

A I only


D I, II, and III

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24.

In the diagram above, the temperature of hot water in container W drops faster than the

temperature of water in container X. This is because

I W is a good radiator of heatII X is a poor radiator of heat

III X is a good absorber of heat

A I only


D I, II, and III

25. The fur of a rabbit becomes fluffier on a cold day to

I trap more air in between the furII increase the size of its body

III to absorb more heat from the surroundings

A I onlyB I and II only


26. An animal that lives in the tundra region usually hasI thick fur

II thick layer of fat

III a rounded shape body

A I only

B I and II only


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27.

Thermometers P and Q in the diagram above shows a reading of 100 C. This shows thatwater in

I both beakers have the same temperature

II beaker Q has a higher heat content than that of beaker PIII both beakers have the same heat content

A I only

B I and II only


28.

Among the following processes of heat transfer, which causes the paper fan in the diagramAbove to spin?

I Convection

II Radiation

III Conduction

A I only


D I, II, and III

29. The quantity of heat of a substance depends on

I its temperature

II its volumeIII its type

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A I only

B I and II only


30. The rate of heat transfer through a metal rod by conduction depends on

I the cross-section area of the rod

II the type of the rodIII the length of rod

A I only


D I, II, and III

31. It is not suitable to wear a black shirt on a hot day because black is a

A. good conductor of heatB. good reflector of heat

C. good absorber of heat

D. good emitter of heat

32. Which of the following is / are true about the transmission of heat from thr sun to the earth?

I. Heat is transmitted by radiation

II. Heat is transmitted through a vacuum

III. Heat is transmitted by paticles

A. I only

B. I and II onlyC. II and III only

D. I,II and III

33 Which of the following is/are true about boiling?

I. Occurs at any temperatureII. Occurs at 100 C

III. Occurs all over the liquid

A. I only

B. I and II only

C. II and III only

D. I,II and III

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34. The diagram shows an experiment to investigatethe transfer of heat using three conductors.

Each rod is heated until the thumbtack drops. The time taken for the thumbtack to drop is

Recorded.

Arrangement of apparatus Time taken

60 seconds

90 seconds

120 seconds

What can you conclude from the above experiment?

A. The iron rod transfers heat faster than the copper rod

B. The glass rod is a good conductor of heat

C. The copper rod is a bad conductor of heat

D. The rate of heat transfer is different for different solids

35. The rate of heat transfer is different for aluminium, iron, glass and copper. Which of thefollowing is arranged in ascending order according to their abilities to conduct heat?

A Iron, glass, copper, aluminium

B. Aluminium, copper, glass , ironC. Glass, iron, aluminium, copper

D. Copper, aluminium, iron, glass

36. Why are the wires on electric poles not fixed tightly?

A. The electric poles will not fallB. Consumers can save money

C. Loosely hung wire will not snap during cold days

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D. Loosely hung wires can conduct electricity easily

37. A metal table at room temperature feel cold because

A. metal is a good insulator of heat

B. metal is always cold at room temperatureC. heat from the metal table is absorbed by our fingers

D. heat from our fingers is absorbed by the metal table

38. The diagram below shows a spiral coil hung above a candle.

When the candle is lighted, the spiral begins to spin. This is becauseA. the spiral absorbs heat from the flame

B. the spiral follows the spinning heat current of heat

C. a convection current is created beneath the spiralD. the spiral becomes lighter:

39. The diagram below shows the direction of heat transfer in a house.

Which of the following activities uses the same principle of heat transfer?

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A. Boiling water in a container

B. Washing clothes in a washing machine

C. Making ice in a freezerD. Toasting bread

40.

In diagram above , when the round bottomed flask containing coloured water is immersed intothe beaker, the water level in the glass tube will

A. drop

B. rise

C. rise slightly and then dropD. drop slightly and then rise

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Heat Paper 1