Page 69 - Journeys Through Society-7

Revision Notes

• Our environment consists of the surroundings we live in.
• Our environment is made up of four realms.
• Atmosphere is composed of troposphere, stratosphere, mesosphere, thermosphere and exosphere.
• Hydrosphere is composed of all the water bodies on Earth.
• Lithosphere comprises the solid outer crust of the Earth.
• Biosphere is the narrow zone of contact where air, water and land are found together and living
organisms exist.

Evaluation Corner

Multiple Choice Questions

• Choose the correct option: OMR Sheet

1. This is the gaseous realm of the Earth.
Use only blue/black ball
a. Lithosphere b. Atmosphere pen to fill the circles. It
c. Hydrosphere d. Biosphere should be darkened
completely and properly.
2. This gas condenses to cause precipitation. Wrong methods
a. Oxygen b. Ozone
Correct method
c. Water vapour d. Nitrogen
3. This is an abiotic component of the environment:
a. Rock b. Tree 1. a b c d
c. Bacteria d. Animals
2. a b c d
4. This animal lives in an aquatic ecosystem:
a. Lion b. Monkey 3. a b c d
c. Fish d. Deer
5. This human activity upsets the ecological balance: 4. a b c d
a. Afforestation b. Deforestation 5. a b c d
c. Forestry d. Rain water harvesting

NEP Aligned

Understanding Based Questions

A. Fill in the blanks:
1. The environment consists of the ______________ and ______________ surrounding of an organism.
2. ______________ is the most abundant gas in the atmosphere.
3. Oceans make up ______________ per cent of the Earth’s surface.
4. ______________ is made up of rocks and forms the continents and ocean beds.
5. ______________ is a narrow zone of contact between air, water and land where living organisms exist.

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