Soil

Q.

What will happen if the top layer of soil is exposed?

Q.

Is soil alive

Q. Why are earthworms important in soils?

1. Earthworms are segmented which means that they cause more caverns for other bacteria
   and microbes to be present underground
2. Earthworms produce fluids which enrich the soil aiding for nitrogen to be present for plant
   growth
3. Earthworms inhibit gaseous exchange killing other bacteria which can be harmful to plants
4. Earthworms ingest soil and excrete soil which allows for some chemicals to be

Q.

Mention any two factors responsible for soil formation.

Q.

_________ and ______ are the two main components of an ecosystem.

Q. Plants are attached to the soil by structures known as ________.​

1. flowers
2. pedicels​
3. roots​
4. leaves

Q. What is sub-soil?

Q. Read the function of parts of a plant given below and write the names corresponding to it.
(a) Fixes plant to the soil
(b) Prepares starch
(c) Supports branches and bears flowers