What are the factors or processes that make soil ?
(a) What is the greenhouse effect?
(b) What are the two forms of oxygen found in the atmosphere.
(a) What is soil erosion ?
(b) What are the methods of preventing or reducing soil erosion.
What are the causes of water pollution? Discuss how you can contribute in
reducing water pollution.
(1) What are the effects of ozone layer depletion.
(ii) Name the compound which damages the ozone layer.
(1) Explain the oxygen cycle.
(i) Why is water necessary for all organisms.
Answers
Answer:
Explanation:
The factors that make soil are parent rock, climate, topography, organisms, rainfall and time.
a) The greenhouse effect is defined as when the Earth's atmosphere becomes thick with gases and substances which trap the sun's radiation, making the Earth warmer.
b) The two forms of oxygen found in the atmosphere are diatomic oxygen (O2) and ozone (O3).
a) The wearing away of the top soil of the earth is known as soil erosion.
b) The various methods for preventing and reducing soil erosion are:
i. Preventing excessive grazing.
ii. Prevention of deforestation.
iii. Plantation of trees and plants.
Causes of Water Pollution:-
Industrial waste, Sewage and wastewater , Mining activities, Marine dumping , Accidental oil leakage , The burning of fossil fuels , Chemical fertilizers and pesticides and Leakage from sewer lines
Reducing Water Pollution:-
Stop the usage of plastics, reuse items, prevent oil spill, do not throw away medicines, wisely dispose the garbage, reduce the usage of detergents and bleaches, etc
1) Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth's surface, which increases the rate of skin cancer, eye cataracts, and genetic and immune system damage, etc
2) Chlorofluorocarbons (CFCs)
1) Oxygen cycle, along with the carbon cycle and nitrogen cycle plays an essential role in the existence of life on the earth. The oxygen cycle is a biological process which helps in maintaining the oxygen level by moving through three main spheres of the earth which are:
Atmosphere
Lithosphere
Biosphere.
This biogeochemical cycle explains the movement of oxygen gas within the atmosphere, the ecosystem, biosphere and the lithosphere. The oxygen cycle is interconnected with the carbon cycle.
The atmosphere is the layer of gases presents above the earth’s surface. The sum of all Earth’s ecosystem makes a biosphere. Lithosphere, which is the solid outer section along with the Earth’s crust and it is the largest reservoir of oxygen.
carbon dioxide keeps earth warm much like glass which keeps the green house warm