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yr 7 sci review
semester two topics
| Question | Answer |
|---|---|
| newtons | unit of force |
| balanced forces | Balance forces are two forces acting in opposite directions on an object |
| gravity | the force that attracts a object towards the centre of the earth |
| contact force | a contact force is a force that works by touching a object |
| friction | the resistance that one surface or object encounters when moving over another |
| spring balance | a balance that measures weight by the tension of a spring. |
| weight | a force exerted on a object by gravity |
| mass | the amount of matter in a object (it always stays the same) |
| spring tide | a tide just after a new or full moon |
| earth's rotation | Earth's rotation is the rotation of Planet Earth around its own axis |
| probe | probe move away from earth's orbit |
| telescope | an optical instrument designed to make distant objects appear nearer |
| buoyancy | A force that acts in water and pushes objects upwards |
| solar eclipse | an eclipse in which the sun is obscured by the moon. |
| static electricity | a stationary electric charge, typically produced by friction |
| heliocentric model | Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System. |
| planet order | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. |
| mitochondria | an organelle found in large numbers in most cells |
| cell wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants |
| microscope | an optical instrument used for viewing very small objects, |
Created by:
aquirk.12
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