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Physics for IGCSE & O level - Forces And Energy (Section 9)

1
What element releases a chemical reaction that produces energy when reacting with air?
Answer
(D)
Hydrogen
2
What is the formula to calculate work done?
Answer
(C)
Force * distance
3
What do fuel cells and solar cells have in common?
Answer
(C)
They both convert energy directly.
4
What is a major advantage of using solar energy?
Answer
(B)
It doesn't cause pollution
5
Which of the following forms of energy can be released by chemical reactions?
Answer
(A)
Chemical
6
What is the formula to calculate kinetic energy (KE)?
Answer
(B)
KE = 1/2mv^2
7
Which of these is NOT a form of energy?
Answer
(D)
Weight
8
What is the name of the process called to extract oil and gas?
Answer
(C)
Fracking
9
What do biofuels and fossil fuels have in common?
Answer
A
D
10
What type of energy does a coiled spring have?
Answer
(B)
Elastic
11
What is the source of energy used in solar cells?
Answer
(B)
Sunlight
12
What is the formula for efficiency?
Answer
(B)
Efficiency = (useful energy output) / (total energy input) x 100%
13
How do biofuels and fossil fuels contribute to global warming?
Answer
(A)
They both release greenhouse gases when burned.
14
Which of the following is a unit of power?
Answer
(C)
Watt
15
Which type of energy is stored in the bonds between atoms?
Answer
(A)
Chemical energy
16
What is the gravitational potential energy of the ball on the left equal to?
Answer
(A)
The work required to lift the ball.
17
What is a cooling tower used for in a thermal power station?
Answer
(C)
To cool the water used in the process.
18
What type of energy is stored in a compressed spring?
Answer
(B)
Elastic
19
Which one is not a fossil fuel ?
Answer
(D)
Hydrogen
20
What is a problem associated with hydroelectric power?
Answer
(B)
Can cause flooding
21
What is meant by the term 'fracking'?
Answer
(B)
The process of extracting gas with high pressure water
22
If an object is at a certain height above the ground, what energy does it have?
Answer
(C)
Potential
23
What is the main source of energy for a biofuel?
Answer
(B)
Sunlight
24
What type of energy relies on the heat from inside the Earth?
Answer
(C)
Geothermal
25
In what direction does the force of gravity act?
Answer
(C)
Downwards
26
What energy is stored in a stretched elastic band?
Answer
(B)
Elastic
27
What percentage of the world's energy comes from non-renewable sources?
Answer
(C)
Approximately 80%
28
What type of energy becomes energy lost from the system?
Answer
(B)
Thermal energy
29
What type of energy transfer takes place in a lightbulb?
Answer
(A)
Electrical to light and heat
30
What type of energy is produced by the sun?
Answer
(C)
Radiant
31
Which of the following is a main benefit of using renewable energy resources?
Answer
(B)
They are a sustainable option
32
Which is a disadvantage of using nuclear power?
Answer
(C)
Generates radioactive waste
33
What are the main disadvantages of fossil fuels?
Answer
A
B
C
34
Which of the following is NOT considered a renewable energy source?
Answer
(C)
Nuclear
35
What is Kinetic Energy?
Answer
(B)
Energy due to motion
36
What are some problems associated with wave energy?
Answer
(B)
It is unreliable
37
What is a major environmental impact associated with the use of coal?
Answer
(C)
Air pollution
38
What process does link to the use of coal for electricity?
Answer
(C)
Combustion
39
What is one of the key benefits of renewable energy sources?
Answer
A
D
40
What process involves extracting natural gas from shale rock?
Answer
(B)
Fracking
41
What is kinetic energy the same as?
Answer
(A)
Work done
42
Which of the following are forms of energy?
Answer
A
B
C
D