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Year 7 science revis

semester 2 topics

newtons It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second
balanced force Image result for balanced force Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an object
gravity the force that attracts a body towards the centre of the earth,
contact forces A contact force is any force that requires contact to occur
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 body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing
spring tide a tide just after a new or full moon
earth rotation Earth's rotation is the rotation of Planet Earth around its own axis
probe A probe is a spacecraft that travels through space to collect science information
telescope an optical instrument designed to make distant objects appear nearer,
buoyancy the ability or tendency of something to float in water or other fluid.
solar eclipse an eclipse in which the sun is obscured by the moon
luna eclipse A lunar eclipse occurs when the Moon passes directly behind Earth and into its shadow
static electricity a stationary electric charge, typically produced by friction
heliocentric model Heliocentric is the astronomical model in which the Earth and planets revolve around the Sun
geocentric model In astronomy, the geocentric model is a superseded description of the Universe with Earth at the center
planet order mercury,Venus,earth,mars,Jupiter,Saturn,Uranus,Pluto
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, fungi, and bacteria
microscope an optical instrument used for viewing very small objects
Created by: Jaxon booth



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