5. How do seeds germinate?
a. When they are watered every day.
b. When they are exposed to sunlight.
c. When they get nutrients from the soil.
d. When there is enough air, moisture and warmth.
6. Which type of soil is good for pot making?
a. clay
b. humus
c. loam
d. sand
7. What gives the topsoil its dark color?
a. There is humus in it.
b. There are earthworms in it.
c. There are dirty substances in it.
d. There are black colored rocks in it.​