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Study
4th Science Review
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When temperature increases do atoms move closer together or further apart?
further apart
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Gravity is a ________ pull force.
non-contact
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Forces make things float or _________.
sink
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How can we change states of matter?
By melting, evaporating, condensing, or solidifying
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Name two non-contact forces.
Gravity & Magnetism
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What force is very weak in space?
Gravity
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Name this state of matter.
Gas
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Name this state of matter.
Liquid
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What two forces are acting on this floating log?
Gravity & Buoyancy
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True or false: Mass is measured in millilitres (ml) and litres (l).
False. grams (g) and kilograms (kg)
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Name this state of matter.
Solid
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Opposite poles of a magnet ________.
attract
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Mass is the amount of ____________ in an object.
matter
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Everything in the Universe is made of ______________.
matter
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True or false: "Mass is the amount of matter in an object" True
True
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True or False: "The Earth´s gravity pull the Moon towards its centre"
True
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What units do we measure volume in? Kg? g? ml? l?
millilitres (ml) & litres (l)
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True or False: Mass is anything that occupies space and has mass.
False: *Matter* is anything that occupies space and has mass.
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The amount of space an object occupies is called __________.
volume
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Magnets have two poles: _______ and ______.
North and south
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What forces can you see in the picture?
Push & Pull
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Liquid>>>>>>>>Solid
Solidifying
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Liquid>>>>>>Gas
Evaporating
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Gas>>>>>>Liquid
Condensing
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How many types of forces are there? Name them.
2: contact forces & non-contact forces
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Solid >>>>>> Liquid
Melting
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How many states of matter are there?
3
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The same poles of a magnet __________. repel or attract ?
repel
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We can´t see forces but we can feel their__________.
effect
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True or False: Friction is a non-contact force.
False
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True or false: "Weight is equal to mass"
False.
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