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Answers
1) Oxygen helps the body's cells function normally. The cycle of carbon dioxide and oxygen on Earth is dependent on plants and animals. Plants provide the oxygen that animals and other living things need to survive. Animals and other living things provide the carbon dioxide that plants need to make their own food.
2) We live in modern and industrial era. ...
Some of the air pollutants are;
a) smoke from the factories.
b) smoke from the fuel vehicles.
c) dust from the construction sites.
3) Ozone protects living being from the ultraviolet radiation coming from the sun. Global Warming is a threat to the World for several reasons. It changes the environment and climate on earth. Melting of glaciers leads to an increase in water level and a decrease in landmass.
4) When water on the Earth's surface is heated by the Sun, it evaporates and turns into water vapour which rises into the air. When the air cools it condenses around some dust or other particles in the air, called condensation nuclei. These small droplets then become visible as clouds.
5) Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. And, we refer to these three-decade averages of weather observations as Climate Normals.
Answer:
Here's your answer
Explanation:
Q 1 what is the importance of carbon dioxide and oxygen for living beings ?
Answer :- Oxygen helps the body's cell function normally . The cycle of carbon dioxide and
oxygen in Earth is dependent on plants and animals . Plants provide oxygen that animals and other living things need to survive . Animals and other living things provide the carbon dioxide need to make their own food .
Q 2 Name three major sources of pollutants in
the air . Also state the ill-effects of these air pollutants ?
Answer:-
- We live in modern and industrial areas .
- Some of air pollutants are :-
1) Smoke from the factories .
2) Smoke from fuel vehicles .
3) Dust from constructions sites .
4) Fumes from the radioactive powerplants
Q 3 What is importance of ozone gas ? why is global warming of threat to life on the earth .
Answer:- Ozone protects living being from the ultraviolet radiation coming from the sun .
Global warming is threat to the world for serval reasons . It changes the environment and climate on the earth . Melting of glaciers leads to
increase in water level and decrease in
landmass .
Q 4 How is rainfall caused ? Explain it with the help of a diagram .
Answer :- Clouds are made of water droplet . Within a cloud water droplets, condense onto
one another, causing the droplets to grow .
When these water droplets get too heavy to
stay suspend in a cloud they fall to the earth as rain .
Q 5 Write the difference between climate and weather ?
Answer :-
Weather :- Weather refers ti short-term changes
in atmosphere .
Climate :- Climate describes what the weather is like over a long period of time in a specific area .
