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year 7 sci review
science study
| Term | Definition |
|---|---|
| newtons | used to measure force 1N - 10g |
| balanced forces | Balance forces are two forces acting in opposite directions on an object, and equal in size |
| gravity | a no-contact force that pulls everything to the earth core and the largest mass/ earth |
| contact force | a force that has to touch the object to effect it |
| 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 | mass times gravity |
| spring tide | when the moons gravity and the suns gravity pulls on the earths water |
| earths rotation | as the earth spins on its axes |
| probe - telescope | probe - moves away from the earth telescope - stays in earth obit |
| buoyancy | a force that acts in water and pushes objects upwards |
| solar eclipse | when the moon travels in between the sun and the earth |
| static electricity | is the build up of positive and negative on two objects |
| heliocentric | the sun at the centure of the solar system |
| geocentric | the earth at the centure of the solar system |
| mitochondria | an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. |
| cell wall | the wall that holds up the the cell membrane |
| microscope | a tool used to look at object with increased view |
Created by:
harlan
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