1.3 Observing changes in matter Flashcards

1
Q

Changes in matter can be —– or —-

A

physical changes or chemical changes

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2
Q

what is a Physical change:

A
  1. When a substance changes from one state to another

2. Physical changes are reversible

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3
Q

What is a chemical change

A
  1. occur when two or substances react to form a new substance
  2. the new substances have different properties than the original substances
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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.

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