LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END COMPUTER PRESENTATIONS FOR KS3 SCIENCE - PHYSICS ©2003, STEVE PARKER COMPUTER PRESENTATIONS FOR KS3 SCIENCE - PHYSICS ©2003, STEVE PARKER

1 1 KS3 SCIENCE - PHYSICS KS3 SCIENCE - PHYSICS States of Matter

STATES OF MATTER 2 2

3 3 Matter can exist in solid, liquid or gaseous form, depending on the temperature, e.g. steam, water or ice Matter can exist in solid, liquid or gaseous form, depending on the temperature, e.g. steam, water or ice

STATES OF MATTER 4 4IceWaterSteam Temperature in degrees Centigrade

STATES OF MATTER 5 5 Solids have a definite shape and volume, and they are hard to compress Solids have a definite shape and volume, and they are hard to compress

STATES OF MATTER 6 6 Liquids have a definite volume, but no definite shape, and they are hard to compress Liquids have a definite volume, but no definite shape, and they are hard to compress

STATES OF MATTER 7 7 Gases have no definite volume and no definite shape, and they are easy to compress Gases have no definite volume and no definite shape, and they are easy to compress

PARTICLE MOVEMENT 8 8

9 9 Matter is made up of tiny particles, called “Atoms”, or clusters of atoms stuck together, called “Molecules” Matter is made up of tiny particles, called “Atoms”, or clusters of atoms stuck together, called “Molecules” In solids, the molecules are attracted to each other and packed tight In solids, the molecules are attracted to each other and packed tight

PARTICLE MOVEMENT 10 But while the molecules stay in their rows, they vibrate constantly But while the molecules stay in their rows, they vibrate constantly

PARTICLE MOVEMENT 11 Liquids also have molecules quite close together, so they are hard to compress Liquids also have molecules quite close together, so they are hard to compress But in liquids, the temperature is higher and so the movement of molecules is faster But in liquids, the temperature is higher and so the movement of molecules is faster

PARTICLE MOVEMENT 12 The molecules move fast enough to escape the attraction and slide past each other, so the shape can change The molecules move fast enough to escape the attraction and slide past each other, so the shape can change

PARTICLE MOVEMENT 13 Gases have molecules that are far apart, so they are easy to compress Gases have molecules that are far apart, so they are easy to compress In gases molecules move very rapidly In gases molecules move very rapidly

PARTICLE MOVEMENT 14 The molecules move so fast that the gas expands to fill any space available The molecules move so fast that the gas expands to fill any space available

DISSOLVING & SOLUTIONS 15

DISSOLVING & SOLUTIONS 16 When a solid “Dissolves” in a liquid, a “Solution” is formed, which is a liquid When a solid “Dissolves” in a liquid, a “Solution” is formed, which is a liquid + + Solvent Solute Solution

DISSOLVING & SOLUTIONS Solvent Solute Solution Solids that can dissolve are called “Soluble”, those that cannot are called “Insoluble”, and if no more solute can dissolve, the solution is “Saturated” Solids that can dissolve are called “Soluble”, those that cannot are called “Insoluble”, and if no more solute can dissolve, the solution is “Saturated”