NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Written by Team Trustudies
Updated at 2021-05-07
NCERT solutions for class 9 Science Chapter 14 Natural Resources Exercise Questions
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
The atmosphere is essential for life because of the following reasons:
1. The atmosphere constitutes of various main gases like O2, N2, and CO2
2. Photosynthesis is due to earth’s atmosphere
3. The constant temperature of the earth is the cause of the earth’s atmosphere
4. Processes like respiration, burning, and combustion are due to the atmosphere
5. The atmosphere is the main reason to restrict UV rays into the earth.
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
Water is essential for life because of the following reasons:
1. All the biological activities are respiration, digestion and other biological reactions are supported by water
2. Living beings are composed of more than 70% of water
3. Transportation of substances from one form to another takes place due to the presence of water.
Q3 ) How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
All living organisms on the earth directly or indirectly dependent on soil for a living. Plants obtain water and minerals through the soil and prepare their food. Other living organisms that live in water are entirely not totally independent of soil because the microbes growing on the soil in water are the primary producers. Primary producers are the main and chief element of the food chain. Various microbes found in soil help in the decomposition of dead plants and animals in water which helps in returning the nutrients and elements back to the water.
Q4 ) You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
Weather is studied as the collection of various elements like high and low temperatures, humidity, rainfall, wind speed and more using various figures and facts with relevant instruments. Hence on the data collected by the meteorologists, we are able to forecast the weather.
Q5 ) We know that many human activities lead to increasing levels of pollution of the air, water-bodies, and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
Human activities are the main reason for the pollution in the air. Air is the medium to spread the pollutants into various sources like water and soil. Hence we can say that limiting activities certain place will definitely help the air pollution to be controlled to some extent.
NCERT Solutions for Class 9 Science Chapter 14 Natural Resources
Answer :
Forests influence the quality of our air, soil and water resources by:
1. Forests help in purifying and increasing the content of oxygen in the air by absorbing carbon dioxide and releasing oxygen.
2. Forest helps in restoring water resources.
3. Forest helps in the prevention of soil erosion.
