Question

B. Fill in the blanks.
1. About three-fourths of the air consists of _______
2. The person who gave oxygen its name is _______
3. The __________
given out during
combustion is used to generate electricity.
4. ___________
bacteria convert nitrates
in the soil to atmospheric nitrogen.​

Answer 1

Answer:

oxygen, nitrogen and carbon dioxide

Human

carbon dioxide

nitrifying bacteria

Answer 2

Answer:

1- nitrogen and oxygen

2- Oxygen

3- Carbon di oxide

4- Nitrifying Bacteria