CHAPTER 6: SOURCES OF ENERGY

1. The object shown in table below possess certain forms of energy. (a) Draw lines to show the correct match between the object that forms

types of energy.

Light energy

Heat energy

Chemical energy

Potential energy

Sound energy

Mechanical energy

Kinetic energy

[6 marks]

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(b) The diagram shows one common energy converter energy changer involved:

Tick ( ) the energy changes involved in the converter.

Electrical energy Heat energy

Electrical energy Light energy

Electrical energy Heat energy + light energy

[1 mark]

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2. Diagram 2 below shows four types sources of energy.

Diagram 2

(a) Based from diagram, label the names for types sources of energy using

the following words.

Wind energy Hydroelectric energy Fossil fuels A : ………………… C : ……………………. D : ………………………

[3 marks] (b) Classify of energy sources using the chart below:

[2 marks]

© State one advantage which has less environmental impact.

…………………………………………………………………………………….. …………………………………………………………………………………….. [1 mark]

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Fossil fuel

Renewable Energy Sources

Sources of energy

3. The diagram shows energy change of the movement of swing.

(a) On diagram above, label the position of the potential energy. [1 mark]

(b) Based on diagram above, state energy involved.

…………………………………………………………………………………….. [1

mark]

(c) State the energy conversion for movement of a swing. …………………………………………………………………………………….. [2 marks]

(d) Based on diagram above, choose the diagram with the same energy conversion from R to Q that take place in diagram above. Mark ( ) in the box for the diagram.

[1 mark]

4. Diagram 4.1 shows a boy playing on a swing.

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Diagram 4.1

(a) State the energy changes involved in the situation.

……………………………………………………………………………………… [1 mark]

(b) At which positions labelled M, N and L does the boy have

(i) maximum kinetic energy? : ………………………………………….

(ii) maximum potential energy? : …………………………………………

(iii) minimum kinetic energy? :

…………………………………………... (iv) minimum potential

energy? : …………………………………………

[2 marks]

(b) What can you conclude about the total energy of the boy at position M, N and L?

…..…………………………………………………………………………………….

[`1 mark] (d) State the energy changes involved in the following energy converter.

(i) Green plant : …………………………………………………………….

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(ii) Dynamo : ………………………………………………………………...

[2 marks] 5.

Diagram 5.1

Diagram 5 .1 shows a student throwing a ball up until it reaches position P. (a) Name the types of energy are involved in stages P and S.

P : …………………………………..

S : ………………………………….. (2 marks)

(c) Numbering the statement below to explain the sequence of the process in

diagram Table 5.

The ball has zero kinetic energy at position S

Potential energy at P is maximum

The ball has increase potential and kinetic energy at position R and Q

Table 5

(3 marks)

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Diagram 5.2 (d ) Diagram 5.2 shows a two situations changes of energy. On

diagram above, draw lines to match and label the same types of energy

for each situation

(2 marks) (e When the marble moves from P to R , the …………………………

energy increase and the ………………………….. energy decreased.

(2 marks)

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6. Some sugar is heated and the burning sugar is then placed in a gas jar

filled with oxygen as shown in the diagram 6.1 . The sugar burns

completely. The gas jar is then shaken with lime water at the end of this

activity.

Diagram 6.1

( a ) i. Based on the experiment observed what happened to the lime water. ………………………………………………………………………………..

(1 marks) ii. What inference can you make based on (a) (i)? ……………………………………………………………………………….. (2 marks) iii State your hypothesis based on your observation on your observation in diagram 7. …………………..………………………………………………………. ……………………………………………………………………………

(2 marks) ( b) State the relationship between the burning of sugar and energy.

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……..……………………………………………………………………………

(1 marks) ( c) State the variables involved in this experiment.

Manipulated variable

Responding variable

Controlled variable Volume of oxygen

(2 marks)

( d ) Based on the experiment ,predict the product formed from the burning sugar. ………………………………………………………………………………..

(2 marks) ( e ) Complete an equations in words based on conclusion which draw from the above activity. Sugar + Oxygen -_______ + _________ + _________

(2 marks)

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7. Diagram 7 shows sources of energy P , Q , R , S and T

Diagram 7

Observe the sources of energy in Diagram 7,

Based on your observation,

( a ) Name each of the following sources of energy.

P : …………………………………………………………………….

Q : …………………………………………………………………….

R : ……………………………………………………………………

S : ……………………………………………………………………

T : ……………………………………………………………………

[ 4 marks ]

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P T

S

R Q

( b ) Classify the sources of energy P.Q.R.S and T in Figure 7 into two group based

on common characteristics.

Name the sources of energy belonging to each group with letters.

( 4 marks )

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energy

…………………………….

GROUP 2

energy

………………………………

GROUP 1

P,Q,R,S T

energy sources of Letters of

characteristics Common