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yr7 science revision
| Question | definitions |
|---|---|
| newtons | unit of force. |
| balanced forces | to forces acting in opposite directions. |
| gravity | Gravity is what keeps us on the Earth. |
| contact forces | forces that are touching. |
| friction | friction is when you rub two things together. |
| spring balance | Measures forces. |
| weight | Weight is affected by gravity. |
| spring tide | moon and sun on the same side of the Earth |
| Earths rotation | It takes 24h for a full rotation |
| probe | when something is sent out from Earth to find information. |
| telescope | Sent out from |
| solar eclipse | when the moon is between the sun and Earth. |
| lunar eclipse | When the Earth is between the sun and moon. |
| static electricity | the build up of negative and positive charges on different surfaces. |
| heliocentric model | When the sun is in the middle. |
| geocentric model | geocentric is when the Earth is in the middle |
| planet order | Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,Pluto |
| mitochondria | mitochondria stores everything. |
| cell wall | found on the outside of a plant cell. |
| microscope | microscope is used to see really small things. |
| buoyancy | A force that acts in water and pushes objects upward. |