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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]
Sources of energy
Renewable Energy Sources
Fossil fuel
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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
energyconversion from R to Q that take place in diagram above.Mark
() in the box for the diagram.
[1 mark]
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4. Diagram 4.1 shows a boy playing on a swing.
(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, Nand L?
...[`1 mark]
(d) State the energy changes involved in the following energy
converter.
(i) Green plant : .
(ii) Dynamo : ...
[2 marks]
Diagram 4.1
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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 indiagram 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
Rand Q
Table 5(3 marks)
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(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)
Diagram 5.2
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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
yourobservation in diagram 7.
...
(2 marks)
( b) State the relationship between the burning of sugar and
energy.
..(1 marks)
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( 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 burningsugar.
..
(2 marks)
( e ) Complete an equations in words based on conclusion which
draw fromthe 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]
Q R
S
TP
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( 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.
Commoncharacteristics
Letters ofsources ofenergy
P,Q,R,S T
GROUP 1
energy
GROUP 2
.
energy
( 4 marks)
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