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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Changes in energy – Quiz

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Changes in energy HIA Science quiz: free practice for HIA International. Work through this Changes in energy HIA Science quiz and get instant feedback on every answer. If you get stuck, review the 21.6 Changes in energy – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
Which statement correctly describes energy transfer diagram?
the energy transferred in a way that is not useful, usually heating the surroundings
the proportion of the input energy that becomes useful output
a diagram showing the stores energy moves between
the principle that energy cannot be created or destroyed
2.
Which statement correctly describes useful output?
the principle that energy cannot be created or destroyed
the energy transferred in a way that is not useful, usually heating the surroundings
the energy transferred in the way the device is designed to do
the proportion of the input energy that becomes useful output
3.
Which statement correctly describes process?
something that happens
movement of energy between stores
a series of changes
a way energy is held
4.
Which statement correctly describes energy transfer?
the principle that energy cannot be created or destroyed
the proportion of the input energy that becomes useful output
the movement of energy from one store to another
the energy transferred in the way the device is designed to do
5.
Which statement correctly describes input energy?
the principle that energy cannot be created or destroyed
the total energy supplied to a device
a diagram showing the stores energy moves between
the energy transferred in the way the device is designed to do
6.
Which statement correctly describes event?
a series of changes
a way energy is held
movement of energy between stores
something that happens
7.
Which statement correctly describes wasted energy?
the energy transferred in a way that is not useful, usually heating the surroundings
the energy transferred in the way the device is designed to do
the principle that energy cannot be created or destroyed
a diagram showing the stores energy moves between
8.
Which statement correctly describes efficiency?
the energy transferred in the way the device is designed to do
the principle that energy cannot be created or destroyed
the movement of energy from one store to another
the proportion of the input energy that becomes useful output
9.
Which statement correctly describes conservation of energy?
the energy transferred in the way the device is designed to do
the principle that energy cannot be created or destroyed
the energy transferred in a way that is not useful, usually heating the surroundings
a diagram showing the stores energy moves between
10.
Using the energy flow diagram for the electric motor, what is its efficiency?
Dr Dabour Hub Academy - figure 1
75%
25%
50%
150%
11.
Match the term to its correct meaning: wasted energy
the movement of energy from one store to another
the proportion of the input energy that becomes useful output
the principle that energy cannot be created or destroyed
the energy transferred in a way that is not useful, usually heating the surroundings
12.
Which term is described as: the total energy supplied to a device?
energy transfer diagram
energy transfer
input energy
useful output
13.
Match the term to its correct meaning: energy transfer diagram
the movement of energy from one store to another
a diagram showing the stores energy moves between
the total energy supplied to a device
the energy transferred in the way the device is designed to do
14.
Which term is described as: something that happens?
process
energy transfer
event
energy store
15.
Which term is described as: the movement of energy from one store to another?
energy transfer
conservation of energy
energy transfer diagram
useful output
16.
Match the term to its correct meaning: useful output
the total energy supplied to a device
the energy transferred in the way the device is designed to do
a diagram showing the stores energy moves between
the energy transferred in a way that is not useful, usually heating the surroundings
17.
Which term is described as: a diagram showing the stores energy moves between?
energy transfer diagram
conservation of energy
input energy
energy transfer
18.
Match the term to its correct meaning: energy transfer
the movement of energy from one store to another
the energy transferred in a way that is not useful, usually heating the surroundings
the total energy supplied to a device
the principle that energy cannot be created or destroyed
19.
Which term is described as: the proportion of the input energy that becomes useful output?
conservation of energy
efficiency
input energy
energy transfer diagram
20.
Which term is described as: the energy transferred in the way the device is designed to do?
energy transfer diagram
useful output
input energy
energy transfer
21.
Match the term to its correct meaning: conservation of energy
the energy transferred in a way that is not useful, usually heating the surroundings
the principle that energy cannot be created or destroyed
the proportion of the input energy that becomes useful output
the movement of energy from one store to another
22.
Match the term to its correct meaning: input energy
the energy transferred in the way the device is designed to do
the proportion of the input energy that becomes useful output
the movement of energy from one store to another
the total energy supplied to a device
23.
Which term is described as: the energy transferred in a way that is not useful, usually heating the surroundings?
useful output
input energy
wasted energy
efficiency
24.
Which term is described as: a series of changes?
event
energy transfer
process
energy store
25.
The energy transferred in the intended way is the _____ output.
wasted
total
useful
input
26.
The proportion of input that becomes useful output is the _____.
resistance
power
efficiency
voltage
27.
No device can be more than _____ percent efficient.
50
200
120
100
28.
Energy cannot be created or _____.
stored
measured
transferred
destroyed
29.
Reducing _____ reduces the energy wasted in a machine.
efficiency
mass
friction
input
30.
Wasted energy usually ends up _____ the surroundings.
cooling
moving
lighting
heating
31.
The total energy before a transfer equals the total after it. - True or false?
True
False
32.
Efficiency is the proportion of input energy that becomes useful output. - True or false?
True
False
33.
A filament lamp wastes almost no energy as heat. - True or false?
True
False
34.
A filament lamp is more efficient than an LED lamp. - True or false?
True
False
35.
Energy cannot be created or destroyed, only transferred. - True or false?
True
False
36.
An LED lamp is more efficient than a filament lamp. - True or false?
True
False
37.
A well-designed device can be 150 percent efficient. - True or false?
True
False
38.
Useful output is the energy that heats the surroundings. - True or false?
True
False
39.
Insulating a house increases wasted energy. - True or false?
True
False
40.
A filament lamp wastes a large fraction of its energy as heat. - True or false?
True
False
41.
When a ball bounces lower each time, energy has been transferred away, not destroyed. - True or false?
True
False
42.
When a ball bounces lower each time, some energy has been destroyed. - True or false?
True
False
43.
The total energy after a transfer is always less than before it. - True or false?
True
False
44.
Wasted energy usually disappears from the universe. - True or false?
True
False
45.
Wasted energy usually ends up heating the surroundings. - True or false?
True
False
46.
Efficiency is the total energy supplied to a device. - True or false?
True
False
47.
Insulating a house reduces wasted energy. - True or false?
True
False
48.
Reducing friction reduces the energy wasted in a machine. - True or false?
True
False
49.
Energy is created by every machine that runs. - True or false?
True
False
50.
Useful output is the energy transferred in the way the device is designed to do. - True or false?
True
False
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Part of Unit 3: Forces and energy — see every lesson and quiz in this unit.
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