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BC Science 8 Chapter 7

Educational prezi, About matters, different states, and something about fluids. Find more info on www.bcsience8.com
by

Yaacov Kochatkov

on 11 June 2013

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Transcript of BC Science 8 Chapter 7

BC Science 8
Chapter 7

By Yaacov K.
According to kinetic molecular theory, all matter is made up of little particles. Every particle is always moving, so every particle has kinetic energy.
Matter is anything that has mass and volume.
Mass
the quantity of matter that a substance or object contains
The more matter, the greater the mass
measured in grams (g) or kilograms (kg)

VOLUME
the amount of space taken up by a substance or an object
measured in millilitres (mL), or litres (L), or cubic centimetres (cm³)

Three states of matter
Gas
Solid
Liquid
A state in which particles are tightly packed. This state holds a definite shape.
particles slip and slide past each other, changing their position. Liquid state can take shape of anything, once filled into something.
The particles have large spaces between
them. Gases are often empty spaces.
Particles can move in all directions.
Thermal expansion - when temperature increases, so matter expands.
Thermal contraction - when the temperature of matter decreases, and the matter decreases in volume.
Heat - energy transferred from one material, or an object, to another. This happens as a result of difference in temperature or a change in state
Kinetic molecular theory
Change in states
The Melting Point - is the temperature at which solid turns to liquid.
The Boiling point - is the temperature at which liquid turns to gas.
Fluids and density
Fluid - any form of matter that can flow.
Density - the mass in a given volume.
Displacement - the amount of space taken by an object when placed in fluid.
Calculating density
Volume (V) = Length x Width x Height
Density = Mass (M) x Volume (V)
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