Students can Download Science Chapter 14 Natural Resources Questions and Answers, Notes Pdf, KSEEB Solutions for Class 9 Science helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.
Karnataka State Syllabus Class 9 Science Science Chapter 14 Natural Resources
KSEEB Class 9 Science Natural Resources Intext Questions and Answers
Question 1.
How is our atmosphere different from the atmosphere on venus and mars?
Answer :
Earth:
(a) The average temperature is maintained,
(b) Biogeochemical cycles are established
Venus :
(a) Rich with carbon dioxide
(b) Green house effect
Mars :
(a) The variable temperature in a day.
(b) Biological life cannot exist
Question 2.
How does the atmosphere act as a blanket?
Answer :
(a) Protect from harmful radiation.
(b) Maintenance of atmospheric gases in a fixed proportion.
(c) Balancing of Earth’s temperature.
(d) Providing vital components to biogeochemical cycles.
Question 3.
What causes winds?
Answer :
Uneven heating of the air establishes a pressure difference in the atmosphere.
Question 4.
How are clouds formed?
Answer :
in water cycles, the water evaporates due to the radiation of the sun and evaporated water condenses to form clouds.
Question 5.
Use any three human activities that you think would lead to air pollution.
Answer :
(a) Effluents
(b) Combustion of fossil fuels
(c) Suspended hydrocarbons.
Question 6.
Why do organisms need water?
Answer :
Maintain metabolic activities. Absorption, digestion, excretion of food. To regulate the osmosis and diffusion!
Question 7.
What is the major source of fresh water in the city/town/village where you time?
Answer :
Ponds / wells / rivers.
Question 8.
Do you know of any activity which may be polluting this water source?
Answer :
Industries, drainage, disposal of non biodegradable substances.
Question 9.
How is soil formed?
Answer :
Weathering of rocks and minerals leads to produce coarse and Granules of matter called soil.
Question 10.
What is soil erosion?
Answer :
Process of taking of top (fertile) soil by the natural calamities.
Question 11.
What are the methods of preventing or reducing soil erosion?
Answer :
(a) Vegetative covering
(b) Percolation of” water into the deeper regions.
(c) forestation and reforestation
(d) cultivation of the soil
Question 12.
What are the different states in. Water is found during the water cycle.
Answer :
(a) Frozen ice cups
(b) Liquid
(c) Gaseous vapor
Question 13.
Name two biologically important compounds that, contain both oxygen and nitrogen
Answer :
(a) Proteins
(b) Ammonia (Nitrates and Nitrites)
Question 14.
List any three human activities which would lead non increase in the carbon dioxide content of air.
Answer :
(a) burning of fossil fuels
(b) industrial effluents
(c) use of organic compounds
Question 15.
What is the greenhouse effect?
Answer :
The atmosphere contains more carbon dioxide, which traps solar radiation to increase the temperature. This process is called greenhouse effect.
Question 16.
What are the two forms of oxygen found in the atmosphere?
Answer :
(a) Carbon dioxide
(b) water
(c) atmospheric oxygen
(d) organic molecule.
KSEEB Class 9 Science Natural Resources Textbook Exercise Questions and Answers
Question 1.
Why is the atmosphere essential for my life?
Answer :
The atmosphere is a blanket which covers the whole of the earth. The atmosphere is essential for all living beings to survive. Because all organisms get oxygen for breathing from the atmosphere.
Question 2.
Why is water essential for life?
Answer :
(a) to carry out all biological forms of life.
(b) to excrete waste the metabolic
(c) maintenance of body temperature
(d) to sustain biological activity necessary for all forms of life.
Question 3.
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
Answer :
Soil provides essential, minerals salts. Nutrients essential for life and provide suitable shelter for all major phylum of phyllumns for animals and plants. Organisms in water also depend upon soil indirectly as.it takes breeding place and maintains a life-saving environment. Minerals, decomposition of living matter.
Question 4.
You have seen weather reports on television and in newspapers. Mow do you think we are able to predict the weather?
Answer :
Pressure belts, winds, movement of clouds, the temperature of a place. (Historically collected data, supports the predictions).
Question 5.
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?
Answer :
Yes. by educating, the importance of the resources. Suitable eco-friendly activities, definitely help to sustain and balance the resources.
Question 6.
Write a note on how forests influence the quality of our air, soil, and water resources.
Answer :
(a) Photosynthesis
(b) transportation
(c) food chain and food wells
(d) precipitation
(e) absorption of pollutants.
KSEEB Class 9 Science Natural Resources Additional Questions and Answers
Question 1.
What is the importance of Humans?
Answer :
It is a major factor in deciding the soil structure because it causes the soil to become more porous and allows water and air to penetrate deep underground.
Question 2.
Name the gas responsible for global 5. Mention the two important warmings. components of biogeochemical
Answer :
Carbon dioxide cycles.
Question 3.
Write the importance of topsoil?
Answer :
The topmost layer of the soil that contains humus and living organisms in addition to the soil particles is called topsoil, it is important to factor that decides biodiversity in that area.
Question 4.
Mention the two ways by which carbon – dioxide percentage is fixed in nature.
Answer :
(i) Green plants convert carbon dioxide into glucose in the presence of sunlight.
(ii) Many marine animals use carbonates dissolved in sea-water to make their shells.
Question 5.
Mention the two important components of biogeochemical cycles.
Answer :
- Reservoir pool
- Exchange pool