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year 7 sci review

science study

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