Multiple choice

When water is poured on the lump of soil, bubbles are seen coming out of it. What are these bubbles made of?

  1. Soil organisms breathing out air.

  2. Soil has air, which gets replaced by water.

  3. The organisms in the soil decompose and foul CO2 comes out.

  4. The water poured on it gets evaporated by sunlight.

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, soil has air, which when replaced by water, comes out in the form of bubbles.