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science revision

yearly exam

newtons the unit that is used to measure force
balanced forces balanced forces are two forces that cancel each other out
gravity a force that pulls things to the center of the earth
contact forces A force that only happens by physical touch
friction Friction is the process in which the force resits the motion
spring balance a technology used to measure forces
weight weight changes if you go to a different planet as the gravity is different
mass mass never changes the weight plus the gravity equals the mass
Earths rotation the Earth rotates around on its axis it rotates for 24hours then starts again
probe the technology that helps us study the world around us there are three types of probes landing probes, orbiting probes and Interplanetary probes
telescope a technology that makes things far away seem closer there are two types of telescopes land telescopes and the ones they put in space
eclipses eclipse means in shadow
solar eclipse when the moon's shadow blokes the sun
static electricity imbalance of electric charges
heliocentric the Sun centered model is called heliocentric
geocentric geocentric means Earth centered which is the old model
planet order mercury, Venus, Earth, Mar, Jupiter, Saturn, Uranus, Neptune and Pluto.
buoyancy A force that makes things float in water
mitochondria this is part of the cell keeping the cell alive by giving it the nutrients it needs and helping it breathe
cell wall a cell wall is on a plant cell it helps keep the plant standing as they don't have a spine like animal and human
microscopes the object we use to study cells and bacteria
Created by: labrown.12



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