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Course: HIA International — Grade 8
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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

GRADE 8 – Unit 3: Forces and energy – Unit review (50 questions)

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  • Questions count: 50
  • Passing grade: B+
  • Time limit:
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1.
Which statement correctly describes mass?
the force of gravity measured in newtons
the attractive force between masses
the units used to measure force
the quantity of matter measured in kilograms
2.
Which statement correctly describes nebula?
the attractive force between masses
the quantity of matter measured in kilograms
a large body orbiting a star
a cloud of gas and dust in space
3.
Which statement correctly describes orbit?
the attractive force acting between masses
a region with no particles
distance travelled per unit time
the curved path of one object around another
4.
Which statement correctly describes earth tide?
a difference in gravitational pull that produces tides
a force that pulls objects toward one another
the difference between high-tide and low-tide levels
a small movement of the solid Earth caused by gravitational attraction
5.
Which statement correctly describes chemical?
relating to the energy of a moving object
relating to energy associated with temperature
relating to energy stored because of position in a gravitational field
relating to energy stored in chemical substances
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 useful?
energy not transferred usefully
spread into the surroundings
obtained again for useful transfer
achieving the intended energy-transfer outcome
8.
What is density?
The weight of an object in newtons
How hot a material is
The space an object takes up
The mass of a material in each unit of volume
9.
What does temperature measure?
How hot or cold something is
The total energy of all the particles
How fast heat flows
The mass of an object
10.
Which statement is the law of conservation of energy?
Energy cannot be created or destroyed, only transferred
Wasted energy vanishes
Energy is used up by machines
Batteries make new energy
11.
Which method of heat transfer works through a vacuum?
Radiation
Conduction
Convection
Evaporation
12.
Which surface is the best absorber of infrared radiation?
Shiny silver
Polished foil
Shiny white
Matt black
13.
Why does evaporation cool the remaining liquid?
The liquid loses mass only
The fastest particles escape, lowering the average energy of those left
Cold air is drawn into the liquid
The container conducts heat in
14.
Which formula gives density?
Mass plus volume
Mass times volume
Volume divided by mass
Mass divided by volume
15.
In which direction does thermal energy flow?
In both directions equally
It does not flow
From hotter to cooler
From cooler to hotter
16.
A device is supplied with 100 J and gives out 30 J of useful energy. How much is wasted?
30 J
70 J
130 J
0 J
17.
Why does warm air rise?
It is less dense than the cooler air around it
It is attracted upwards
It is heavier
It contains more oxygen
18.
Why are houses in hot countries often painted white?
White reflects radiation and keeps them cool
White conducts better
White paint is heavier
White absorbs more radiation
19.
Which conditions dry washing fastest?
Humid and covered
Cold, still and folded
Warm, windy and spread out
Cool and indoors
20.
Which statement correctly describes weight?
the quantity of matter measured in kilograms
the attractive force between masses
the units used to measure force
the force of gravity measured in newtons
21.
Which statement correctly describes gravity?
a cloud of gas and dust in space
a large body orbiting a star
the attractive force between masses
the quantity of matter measured in kilograms
22.
Which statement correctly describes gravitational force?
the curved path of one object around another
a region with no particles
distance travelled per unit time
the attractive force acting between masses
23.
Which statement correctly describes tidal force?
a small movement of the solid Earth caused by gravitational attraction
a force that pulls objects toward one another
the difference between high-tide and low-tide levels
a difference in gravitational pull that produces tides
24.
Which statement correctly describes kinetic?
relating to energy stored in chemical substances
relating to energy stored because of position in a gravitational field
relating to the energy of a moving object
relating to energy associated with temperature
25.
Which term is described as: the amount of matter in an object, measured in kilograms and the same everywhere?
mass
weight
newton
newtonmeter
26.
Which term is described as: the huge cloud of gas and dust from which the Solar System formed?
nebula
gravitational collapse
protostar
rocky planet
27.
Which term is described as: the time an object takes to complete one orbit?
orbital period
rotation period
satellite
geostationary orbit
28.
Which term is described as: the regular rise and fall of the level of the sea?
tide
low tide
high tide
tidal power
29.
Which term is described as: a way energy is held, such as kinetic, chemical, thermal or gravitational potential?
energy store
kinetic energy store
joule
energy pathway
30.
Which term is described as: the movement of energy from one store to another?
energy transfer
conservation of energy
energy transfer diagram
useful output
31.
Which term is described as: the spreading out of energy to the surroundings so it is no longer useful?
dissipation
conduction
convection
thermal insulator
32.
Which term is described as: the quantity of matter measured in kilograms?
weight
gravity
newtons
mass
33.
Which term is described as: a cloud of gas and dust in space?
gravity
mass
planet
nebula
34.
Which term is described as: the curved path of one object around another?
gravitational force
speed
orbit
vacuum
35.
Which term is described as: a small movement of the solid Earth caused by gravitational attraction?
tidal force
force of attraction
tidal range
earth tide
36.
Which term is described as: relating to energy stored in chemical substances?
kinetic
thermal
gravitational potential
chemical
37.
Which term is described as: something that happens?
process
energy transfer
event
energy store
38.
Which term is described as: achieving the intended energy-transfer outcome?
wasted energy
dissipated
recovered
useful
39.
Mass is measured in _____.
joules
metres
newtons
kilograms
40.
The cloud of gas and dust the Solar System formed from is a _____.
comet
crater
galaxy
nebula
41.
The time for one complete orbit is the orbital _____.
radius
angle
speed
period
42.
Tides are caused mainly by the gravity of the _____.
Earth
stars
Sun
Moon
43.
Energy is measured in _____.
watts
kilograms
newtons
joules
44.
Mass is measured in kilograms. - True or false?
True
False
45.
The Solar System formed from a huge cloud of gas and dust called a nebula. - True or false?
True
False
46.
The orbital period is the time taken for one complete orbit. - True or false?
True
False
47.
Tides are caused mainly by the gravitational pull of the Moon. - True or false?
True
False
48.
Energy is measured in joules. - True or false?
True
False
49.
Energy cannot be created or destroyed, only transferred. - True or false?
True
False
50.
Dissipated energy has spread out to the surroundings and is no longer useful. - 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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