1.3 Observing changes in matter Flashcards
1
Q
Changes in matter can be —– or —-
A
physical changes or chemical changes
2
Q
what is a Physical change:
A
- When a substance changes from one state to another
2. Physical changes are reversible
3
Q
What is a chemical change
A
- occur when two or substances react to form a new substance
- the new substances have different properties than the original substances
4
Q
Evidence of a chemical change
A
gas is produced, tempature changes, substance disappears, solid is formed, colour change occurs, new odour is produced.