Question

3
Which is NOT true about firewood that burns
completely?
A Ashes and gases form from the substances
in the wood.
B Oxygen from the air combines with
substances in the wood.
C The total mass of substances in this process
decreases.
D The wood gives off thermal energy and light.​

Answer 1

.

B Oxygen from the air combines with

substances

Answer 2

B Oxygen from the air combines with

substances in the wood.