Matter

Introduction

  Anything that takes up space, and has mass. 

Can be living such as trees, insects, and humans. It can also be non-living like wood, rocks, metal, air, water. 

Is made up of tiny particles called atoms. 

Everything on our Earth is in one of three states – solid, liquid or gas. 

 Atoms - are building blocks of all matter. 

  Structure and Properties of Atoms   Atomic number (Z)  an element gives the number of protons in the atom and determines which element the atom is. 

 Mass number  of an element is the number of protons plus the number of neutrons in an atom of that element. 

 Structure and Properties of Matter Matter comes in three forms: 

1) Solids  are arranged in a fixed pattern and held very closely together. 

 2) Liquids  The particles in a liquid possess more energy than the particles of solids. Therefore, the particles have some space between them and so can move easily or flow.  3) Gases  The particles in gases are very loosely held together  Model of three states of matter  Expansion and Contraction of Matter Expansion – something that grows big Contraction – something that grows small