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# Science revision

### Semester two topics

TermDefinition
Newtons The unit of measurement for forces
Balanced Force Where the forces that are acting in pairs are equivalent and keep the object in the same direction. (basically the forces cancel each other out)
Solar Eclipse When the moon is between the sun and Earth and causes there to be no light from the sun hitting a part of the Earth.
Gravity The downwards pull of all things to all objects that have mass.
Contact Force Where a force that is acting upon an object is physically touching it.
Friction The resistance that a surface or object experiences when moved over another.
Spring Balance The tool used to measure forces.
Weight Weight is mass times gravity.
Mass The amount of matter that's in an object.
Spring Tide When both the sun and moon are on the same side of Earth and create a further gravitational pull on the Earth hydrosphere.
Earths rotation The Earth has a complete rotation around its axis over 24 hours.
Probe A spacecraft that is sent to space to collect information and often orbit other planets.
Telescope A tool used to see far-away objects.
Buoyancy A force that acts in water and pushes objects upward.
Static Electricity Static electricity is the build up of an electrical charge on the surface of an object.
Heliocentric Model The model of our solar system where all plants, moons ect orbit the sun.
Geocentric Model The model of our solar system where all planets, moons ect orbit Earth.
Planet Order Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Pluto
Mitochandria The part of most cells where respiration and energy production occurs.
Cell Wall The wall around a plant cell to give the cell strength and structure.
Microscope A tool used to view very small objects.
Created by: zmartin.12

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