Tag: physical resources

Questions Related to physical resources

Which among the following result in the formation of soil?

soil as a natural resource natural resources - air, water and land land physical resources biology

  1. Radiation

  2. Weathering

  3. Erosion

  4. Pollution

Show answer
Correct Option: B

What is best pH of soil for cultivation?

soil as a natural resource natural resources - air, water and land land physical resources biology

  1. 3.4 - 5.4

  2. 4.5 - 5.5

  3. 5.5 - 6.5

  4. 6.5 - 7.5

Show answer
Correct Option: C
Explanation:

  • Soil nature is described in pH values. It can be alkaline, acidic or neutral. 
  • Highly acidic and highly saline soil often remains injurious for plant growth, microorganisms, etc. 
  • Soil pH strongly affects microbial activities. Neutral or slightly acidic soil (5.5-6.5) remains best for the growth of the majority of plants.

Therefore, the correct answer is option C.

Gaseous envelop surrounding the earth is called

biology physical resources air and winds wind energy air as a natural resource

  1. Lithosphere

  2. Mesophere

  3. Stratosphere

  4. Atmosphere

Show answer
Correct Option: D
Explanation:

The atmosphere is a gaseous envelope surrounding the earth. It is mostly composed of nitrogen, oxygen, argon, carbon dioxide and some other gasses in trace amounts. The atmosphere is held in place by gravity of the earth.    Thus the correct answer is option D.

What causes movement in air?

biology physical resources air and winds wind energy air as a natural resource

  1. Difference in temperature

  2. Difference in pressure

  3. Difference in volume

  4. Both A and B

Show answer
Correct Option: D
Explanation:
Movements in the air are caused due to pressure and temperature gradient. The high temperature leads to the rising of air which creates a low-pressure region. The air from the surrounding high-pressure zone moves to low-pressure area to stabilise the pressure which creates a breeze
So, the correct answer is 'Both A and B'

The instrument which measures wind velocity is

biology physical resources air and winds wind energy air as a natural resource

  1. Lactometer

  2. Anemometer

  3. Hydrometer

  4. Barometer

Show answer
Correct Option: B
Explanation:

Anemometer is the instrument used to measure wind velocity. Hydrometer measures specific gravity (or relative density) of liquids. Barometer is used to measure atmospheric pressure. Lactometer measures cream content of milk.

The instrument which measures wind velocity is

biology physical resources air and winds wind energy air as a natural resource

  1. Lactometer

  2. Anemometer

  3. Hydrometer

  4. Barometer

Show answer
Correct Option: B

As the air temperature increases, the air's capacity for water vapor:

biology physical resources air and winds wind energy air as a natural resource

  1. Increases

  2. Decreases

  3. Remains constant

  4. Is unrelated to air temperature and can either increase or decrease

Show answer
Correct Option: A

The earth's first atmosphere was composed primarily of:

biology physical resources air and winds wind energy air as a natural resource

  1. Carbon dioxide and water vapor

  2. Hydrogen and helium

  3. Oxygen and water vapor

  4. Argon and nitrogen

Show answer
Correct Option: B

Which of the following is considered as the major source of fresh water?

biology physical resources water resources and conservation receding water table water conservation and irrigation

  1. Tap water

  2. Sea water

  3. Well water

  4. Ground water

Show answer
Correct Option: D
Explanation:

Ground water is considered as the major source of fresh water.

Which of the following is not a greenhouse gas?

zoology physical resources carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Methane $CH _4$

  2. Ozone $O _3$

  3. Oxygen $O _2$

  4. Carbon dioxide $CO _2$

Show answer
Correct Option: C
Explanation:

Oxygen is not greenhouse gas, because they are transparent to infrared light.