Air

---

Question

---

Question 1 :

Our earth is surrounded by a huge blanket of

1. Air
2. Plants
3. Water
4. Sand
Answer
21039

Question 2 :

Which two gases make up the bulk of the atmosphere

1. Nitrogen and Hydrogen
2. Nitrogen and oxygen
3. Carbon and Hydrogen
4. Carbon and oxygen
Answer
21040

Question 3 :

Cold air is ____ than hot air

1. Less denser and light
2. Small and light
3. Denser and heavy
4. Small and heavy
Answer
21041

Question 4 :

Which is the second most plentiful gas in the air

1. Oxygen
2. Argon
3. Hydrogen
4. Nitrogen
Answer
21042

Question 5 :

Green plants use ____ to make their food and release ___

1. carbon dioxide, oxygen
2. carbon dioxide, hydrogen
3. helium, hydrogen
4. oxygen, helium
Answer
21043