Chemical and physical changes, rusting

Question 1 of 10

Carbon monoxide is a harmless gas.

Question 2 of 10

The poisonous gas from burning charcoal in a closed room is carbon ___.

Question 3 of 10

Coating iron with zinc to prevent rusting is called

Question 4 of 10

Burning (combustion) needs fuel, heat and

Question 5 of 10

Which is a chemical change?

Question 6 of 10

Melting butter is a chemical change.

Question 7 of 10

Which metal does NOT rust?

Question 8 of 10

Salt water makes rusting

Question 9 of 10

Rusting is a chemical change.

Question 10 of 10

The three things needed for fire are fuel, heat and ___.