Nin Science Endtem 1

Reactionor No Reaction?

Zinc oxide + calcium

• Yes

• No

Reactionor No Reaction?

Magnesium + iron oxide

• Yes

• No

Reactionor No Reaction?

Magnesium sulphate + zinc

• Yes

• No

Reactionor No Reaction?

Gold + copper oxide

• Yes

• No

Reactionor No Reaction?

Calcium + copper oxide

• Yes

• No

Metals that are found free or uncombined in nature are called ..........

Most metals are found in compounds.This is because they are more reactive than the previous metals. .................. are rocks that containmetal compounds.

When a compound breaks down into simpler substances using heat.

• Thermal Decomposition

• Electrolysis

• Fire Triangle

• Fuel combustion

Calcium Carbonate -----> Calcium Oxide + Carbon Dioxide

This is an example of ............................

Energy exits reaction

• exothermic

• endothermic