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