PPT: Natural Phenomena | Science & Pedagogy Paper 2 for CTET & TET Exams - CTET & State TET PDF Download

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Natural 
Phenomena
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Natural 
Phenomena
Types of Natural Resources
Inexhaustible Resources
Present in unlimited quantity in nature. Not likely 
to be exhausted by human activities.
Examples: sunlight and air.
Exhaustible Resources
Present in limited quantity. Can be exhausted by 
human activities.
Examples: forests, wildlife, minerals, coal, 
petroleum, and natural gas.
Natural resources are useful raw materials obtained from the earth. Humans cannot make these 
resources; they occur naturally.
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Natural 
Phenomena
Types of Natural Resources
Inexhaustible Resources
Present in unlimited quantity in nature. Not likely 
to be exhausted by human activities.
Examples: sunlight and air.
Exhaustible Resources
Present in limited quantity. Can be exhausted by 
human activities.
Examples: forests, wildlife, minerals, coal, 
petroleum, and natural gas.
Natural resources are useful raw materials obtained from the earth. Humans cannot make these 
resources; they occur naturally.
The Atmosphere
Troposphere
Layer closest to earth's surface. Extends 10-15 km above earth.
Stratosphere
Directly above troposphere. About 35 km deep, extending 15-50 
km above earth.
Mesosphere
Above stratosphere. Extends 50-80 km above earth's surface.
Thermosphere
Extends from 80 km above earth to outer space.
Air is a mixture of gases: nitrogen (78%), oxygen (20.95%), carbon 
dioxide (0.031%), argon (0.93%), and others (0.04%).
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Natural 
Phenomena
Types of Natural Resources
Inexhaustible Resources
Present in unlimited quantity in nature. Not likely 
to be exhausted by human activities.
Examples: sunlight and air.
Exhaustible Resources
Present in limited quantity. Can be exhausted by 
human activities.
Examples: forests, wildlife, minerals, coal, 
petroleum, and natural gas.
Natural resources are useful raw materials obtained from the earth. Humans cannot make these 
resources; they occur naturally.
The Atmosphere
Troposphere
Layer closest to earth's surface. Extends 10-15 km above earth.
Stratosphere
Directly above troposphere. About 35 km deep, extending 15-50 
km above earth.
Mesosphere
Above stratosphere. Extends 50-80 km above earth's surface.
Thermosphere
Extends from 80 km above earth to outer space.
Air is a mixture of gases: nitrogen (78%), oxygen (20.95%), carbon 
dioxide (0.031%), argon (0.93%), and others (0.04%).
Air Pollution
Primary 
Pollutants
Available directly 
in atmosphere. 
Examples: 
volcanic ash, 
carbon 
monoxide, 
sulphur dioxide, 
CFCs.
Secondary 
Pollutants
Form when 
primary 
pollutants 
contact air. 
Example: Peroxy 
Acyl Nitrate 
(PAN).
Greenhouse 
Effect
Warming caused 
by gases trapping 
solar energy. 
Common 
greenhouse 
gases: water 
vapor, CO2, 
methane.
Air pollution occurs when air is contaminated by harmful 
substances affecting both living and non-living things.
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Natural 
Phenomena
Types of Natural Resources
Inexhaustible Resources
Present in unlimited quantity in nature. Not likely 
to be exhausted by human activities.
Examples: sunlight and air.
Exhaustible Resources
Present in limited quantity. Can be exhausted by 
human activities.
Examples: forests, wildlife, minerals, coal, 
petroleum, and natural gas.
Natural resources are useful raw materials obtained from the earth. Humans cannot make these 
resources; they occur naturally.
The Atmosphere
Troposphere
Layer closest to earth's surface. Extends 10-15 km above earth.
Stratosphere
Directly above troposphere. About 35 km deep, extending 15-50 
km above earth.
Mesosphere
Above stratosphere. Extends 50-80 km above earth's surface.
Thermosphere
Extends from 80 km above earth to outer space.
Air is a mixture of gases: nitrogen (78%), oxygen (20.95%), carbon 
dioxide (0.031%), argon (0.93%), and others (0.04%).
Air Pollution
Primary 
Pollutants
Available directly 
in atmosphere. 
Examples: 
volcanic ash, 
carbon 
monoxide, 
sulphur dioxide, 
CFCs.
Secondary 
Pollutants
Form when 
primary 
pollutants 
contact air. 
Example: Peroxy 
Acyl Nitrate 
(PAN).
Greenhouse 
Effect
Warming caused 
by gases trapping 
solar energy. 
Common 
greenhouse 
gases: water 
vapor, CO2, 
methane.
Air pollution occurs when air is contaminated by harmful 
substances affecting both living and non-living things.
Water Resources
71%
Earth's Surface
Percentage covered with water.
3
States of Water
Solid (ice), liquid (oceans), and 
vapor (atmosphere).
0.006%
Fresh Water
Percentage of earth's water that 
is fresh and usable.
Water is essential for cooking, bathing, irrigation, construction, and more. World Water Day is celebrated 
on March 22nd annually.