Question

class 7 geo chapter 1 and 2 test​

Answer 1

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Chapter 1.

Environment

❥ Environment means the surrounding around us which

❥ It provides us with the air, water, food and land.

$\boxed{\bf Natural } \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \bf Human \: made} \\ \\ \fbox{ \bf Component \: \: of \: \: Environment } \\ \\ \fbox{ \bf Human}$

↱ Biotic - living (plants)

Environment

↳ Abiotic - Non - living (land,water,etc.)

1. Natural Environment

❥ land, water, air, plants and animals compromise the natural environment.

Lithosphere - Solid crush or the top layer of the earth.

2. Hydrosphere

❥ The water bodies of earth is called hydrosphere

example : - Rivers, lakes, seas, oceans etc.

3. Atmosphere

❥ It is the thing layer of air which surrounding the earth.

❥ It protect us from the harmful rays from the sun.

❥ It consists of gases dust and water vapour.

What is ecosystem

❥ Ecosystem is a system in which all the the organism instruct with each inter depend on each other.

Example : - Rain forest is an ecosystem grass, land, desert, etc are of ecosystem.

Human Environment

❥ Human being instruct with the environment and modify it according to their needs.

❥ Human fulfill their needs from environment.

❥ But overxplanation of natural environment led to the imbalance in the ecosystem.

❥ Human must learn to live and use environment in a harmonious way.

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Chapter 2.

Inside our Earth

Rocks and minerals

★ Any natural mass of minerals mettle that makes up the earth's crush is called rock.

★ Earth's Crush is made up of various kinds of Rocks.

$\sf \: Rocks \\ ╔════════════════════════════╗ \\ \sf Igneous \: rocks \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Sedimentary \: rock\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Metamorphic \: rocks$

1. Igneous rock

★ When metals magma cools, they from Igneous rock.

★ They are also called primary rocks.

★ They are two types Intrusive rocks in continue rocks and extrusive rocks.

2. Sedimentary rocks.

★ when the smaller parts of rocks (called sediments) deposit by wind, water etc and are compressed one hardware to from sedimentary rocks.

Example : - Sandstone

★ This rocks also called contain fossils.

3. Metamorphic rocks

★ when igneous rock sedimentary are under great heat and pressure,from metamorphic rocks.

Example : - clay changes late & limestone