Chemistry-using chemical reactions to make new materials

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Where are raw materials obtained from?
the earth,sea and air.Chemical reactions are then used to turn the raw materials into useful products
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What do chemical reactions do?
use up reactants and produce new substances called products
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What happens to the atoms in chemical reactions?
atoms are rearranged but no new atoms are produced nor are any atoms destroyed
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What are the signs of a chemical change?
colour change,formation of a precipitate,a temperature change or gas being produced
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What are reactions in which temperature rises?
Exothermic
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What are reactions in which the temperature falls?
Endothermic
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Card 2

Front

What do chemical reactions do?

Back

use up reactants and produce new substances called products

Card 3

Front

What happens to the atoms in chemical reactions?

Back

Preview of the front of card 3

Card 4

Front

What are the signs of a chemical change?

Back

Preview of the front of card 4

Card 5

Front

What are reactions in which temperature rises?

Back

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