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science exam revisio

semester 2 topics

newtons The unit that force is measured in.
non contact force The force which acts on an object without physically having to come in contact with the object
spring balance the instrument in which we use to measure force(newtons)
weight The force of gravity on the object. mass x gravity.
mass The amount of matter that is in an object. mass never changes.
spring tide A tide just after a full or new moon.
probe a spacecraft that travels through space to collect data and scientific information to send back to scientists
luna eclipse A lunar eclipse occurs when the sun and moon are in line but on opposite sides of the earth making the moon be in the shadows
static electricity The imbalance of electric charges within or on the surface of a material.
buoyancy The force that causes objects to float in water or some form of liquid.
planet order mercury, Venus,earth, mars, Jupiter, Saturn, Uranus, Neptune, Pluto (all though we don't usually include Pluto as it is a dwarf planet.
mitochondria produces energy, it is called the power house
cell wall a structural layer surrounding some types of cells, just outside the cell membrane
microscope we use microscopes to view cellular structures.
what causes the seasons Seasons are caused by the 23.5 degree tilt of the earths axis away or towards the sun as it travels in orbit around the sun
friction The resistance that one surface or object encounters when moving or rubbing against another.
Created by: tmales.12