Natural Resources Test - 27

The changes in the atmosphere have a very high impact on climate. As, the parameters like - temperature, etc. changes the atmosphere changes. This change in atmosphere causes the climate change. Thus, In long run, weather will also change.

Correct Option: C

Explanation:

• The atmosphere protects us from solar radiations by making a blanket-like structure around the earth.
• Since the atmosphere is a bad conductor of heat, it regulates the heat from the sun.
• This maintains the average temperature of earth throughout the year.
• During the day, the atmosphere blocks the radiation from the sun and during the night it absorbs the heat radiated from the earth.
• Therefore, the absence of the atmosphere would allow the radiations from the sun reach the earth and lets the heat from the earth escape.

Hence, if there is no atmosphere around the earth, the temperature of the earth will increase during day and decrease during night.

Strong winds, flowing water and heating and cooling of rocks leads to its breakdown. They break the tough rock particles and convert them into smaller ones. They also create cracks in them. 

The top most layer of soil is said to contain and support a lot of living organisms. It also has organic manure in it that supports the growth and development of plants. 

Nitrogen is the most abundant gas in the atmosphere, comprising about 78% of it. 

Freshwater fish has adapted to low salt conditions. Salt is a desiccant, it absorbs water which leads to dehydration. So they die if kept in marine habitat. 

• In the air, there are 2 forms of oxygen. 
• One is a diatomic oxygen molecule, i.e., $$O_2$$and another is a tri-atomic oxygen molecule, i.e., $$O_3$$ in the form of ozone.

• The process of nitrogen metabolism is not involved in the water cycle. By the process of photosynthesis, plants absorb water from the soil. Through transpiration, they lose water back to the atmosphere through stomata.
•  By the process of evaporation, water from water bodies is condensed leading to the formation of clouds. 
• Clouds then shower rainfall that restores the water evaporated from water bodies and also the groundwater levels.

During heavy rainfall, trees act as natural absorbers. The roots of trees hold the soil tightly and prevent its erosion, thereby reducing sediments going into rivers and increasing water absorption into the ground. But when the soil is without vegetation cover, the rainwater carries away the soil and causes its loss. Thus, the correct answer is option B.