Page 159 - York Global Science 6 - Physical Science

Physical Science

Magnetism – A magnet pulling other objects.
Mass – How much matter there is in an object.

Matter – Any substance or material that takes up space. Everything we can
see or feel is made of matter.

Melt – Change from solid to liquid.
Mixture – A substance made from two or more different substances put together.

Molecule – A group of two or more atoms joined together.
Motion – Movement; when an object’s position changes over time.

Natural gas – A gas from under the ground that is used as fuel.
Negatively charged – An electrical charge carried by electrons.

Neutral – A neutral particle has no charge.
Neutron – Part of an atom with no electrical charge. Neutrons are neutral.

Newton – The unit used to measure force.

Non-contact force – A force that works when there is empty space between
two things.
Non-renewable energy – Energy that cannot be replaced after it is used.

Oil – A liquid (petroleum) that comes from the ground.
Opaque – Something you cannot see through.

Orbit – To move around another object, like a planet.
Particle – A very small piece of matter.

Particle theory – The idea that all matter is made of many tiny particles that
are always moving.

Permanent – Lasting for a very long time.
Physical change – A change where no new substances are made. A physical
change is reversible.

Planet – Large objects that orbit a star.

Point – A position on a graph.
Polar regions – The North and South Poles at the top and bottom of the Earth,
and the areas around them.

Polarise – To cause something have a difference in charge.
Pollute – To put dangerous or dirty substances into the environment.

Pollution – When dangerous materials get into the environment.
Positively charged – An electrical charge carried by protons.

Potential difference – The difference in electrical charge between two points
in a circuit.
159