1. SCIENCE GRADE THREE – STATES OF MATTER
Changes
Chemical reactions
Dissolving
Separation
States of
Matter
Classification
Change in appearance
Properties
Mixtures
Essential Understandings:
Changes occur all the time in the world around us
Substances can be classified as solids, liquids or gases
Solids, liquids and gases can be described by their properties
Combining solids, liquids or gases, or a combination of these can make mixtures. Mixtures can be separated into their original components
A substance can change in appearance, yet remain the same substance
Some substances can be separated using a sieve, a filter, or the processes of evaporation and chromatography
Dissolving can be affected by several factors
When two or more substances are mixed, a chemical reaction may occur
Vocabulary:
Gas
Liquid
Molecule
Property
Solid