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Physics Form 1

Answerallquestions in this section in the spaces provided. The marks allocated for eachquestion are stated at the end of the question.

1. Many everyday items use energy transfers.

A torch transfers energy of one type into other types.

Use the words in the list below to complete the sentences.

chemical

electrical

kinetic

light

gravitational potential

sound

thermal (heat)

a. The torch battery is an energy source. It stores energy.

b. !hen the torch is switched on" energy is

transferred from the battery to the bulb.

c. #nergy is transferred by the bulb to the surroundings as

energy and ....................................................... energy.

$% marks&

'. (a) *ill in the blanks with the following words.

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+ ,enewable + -onrenewable

(i) energy sources are energy sources thatcan be replaced when they have been used.

(ii) energy sources are energy sources that

cannot be replaced and finally be used up. $' marks&

(b) /lassify the following energy sources into renewable energy and nonrenewable

energy.

$' marks&

(c) 0tate the form of energy represented by each of the following pictures.

$ marks&

2. 3iagram ' shows that a marble is released and rolls down an inclined plane.

(a) (b) (c)

(d) (e) (f)

!ind radioactive sources

Sources of energy

Renewable Non-renewable

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P

Q

R S

Marble

Diagram 2

(a) 0tate the energy changes in the marble as it rolls down from 4.

$1mark&

(b) At which point does the marble have the

(i) highest kinetic energy5

$1 mark&

(ii) highest potential energy5

$1 mark&

%. (a) !hat is the meaning of energy5

$1 mark&

(b) !rite the changes of energy involved in the following situations.

$' marks&

6. 0tate whether each of the following statements is true or falsefor the importance of

conserving energy sources.

Situation Changes of energy

(i)

(ii)

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(a) Use public transport to help conserve energy sources. ( )

(b) 7eeping lights and fans switched on all the time. ( )

(c) ,euse material to avoid wastage of energy. ( )

(d) /arpooling helps conserve energy sources. ( )

(e) !e should use oil lamps as nightlight instead of electric lamps. ( )

$6 marks&

.

3iagram 2.1

A student carried out an activity to investigate the situation in 3iagram 2.1. They hold a

magnifying glass on the match and ad8ust so that the sunlight focused on the match. They

maintain the position of the magnifying glass for a few minutes.

Underline the correct word.

(a) !hat caused the match to burn5( 4otential 9 :eat 9 /hemical).

(b) !here does the heat come from5It come from the ( moon 9 sun 9 comet )

(c) ;ive two e

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End of Questions