Soil and Its Formation
Trending Questions
Why is earth called the unique planet?
What do you mean by hygroscopic water and combined water in the soil ? Are these available to plants?
What is paedogenesis?
Lichens growing on rocks are called
Corticolous
Saxicolous
Terricolous
Lignicolous
- topsoil
- subsoil
- bedrock
- sand
Name the two processes which contribute to. soil formation.
- Formation of soil
- Study of soil
- Development of soil
- Classification of soil
What do you mean by biological weathering ? Give two examples.
Name three physical agents which cause weathering of rocks.
What is weathering ? Elucidate in the various types of weathering.
- True
- False
- True
- False
How are living organisms are dependent on the soil?
How do organisms contribute in the formation of soil ?
How does the soil get polluted?
- Strong water flow causes wearing of rocks which leads to soil formation.
- Outermost layer of Earth contains variety of nutrients.
- Humus reduces the fertility of the soil.
- Sun and water are two factors that helps in soil formation.
Which is the outermost layer of the Earth?
Crust
Mantle
Outer core
Inner core
Following are a few organisms.
(a) Lichen (b) Mosses (c) Mango tree (d) cactus
Which among the above can grow on stones; and also help in the formation of soil? Write the mode of their action for making soil.
What is soil ? How does it form ?
- True
- False
- Algae
- Lichens
- Frogs
- Worms
Which of the following is an example of man-made change?
Formation of clouds
Weathering of rocks
Cooking of food
Beating of the heart
The growth of Lichens on barren rocks is followed by the growth of :
Moss
Ferns
Gymnosperms
Algae
- Temperature
- Water
- Gravity
- Wind
- Chemical weathering
- Physical weathering
- Biological weathering
- Humification
Which of the following factors is not responsible for soil formation?
Wind
Water
Sun
Greenhouse effect
- Parent rocks
- Time
- Soil texture
- Climate
- False
- True
Define paedogenesis.
Define soil.