Dormant volcanoes are ………
a) not erupted in a long time b) erupted recently
c) never erupted d) none of these
3. Metamorphic rocks are formed due to the change in …………
a) physical structure b) heat and pressure c) colour d) density
4. The climate of the earth is changing due to …………
a) global warming b) acid rains c) Tsunami d) natural calamities
5. Terrace farming is a good measure to reduce soil erosion in ………
a) hilly regions b) Tarai regions c) deserts d) flood prone regions
6. …… rocks are formed by the deposit of rock particles washed from mountains.
a) Igneous rocks b) Minerals c) Metamorphic d) Sedimentary
7. Our environment is formed by the things that ………. us
a) apart from b) away from c) surround d) none of these
8. The rocks mainly comprise quartz, mica and feldspar is …………
a) Pumice b) Basalt c) Granite d) Limestone
9. Man’s activity causes
a) soil conservation b) afforestation c) water increase d) deforestation
10. Men’s activities lead to
a) water pollution b) air pollution c) noise pollution d) all of these
11. Which of the following is used to record seismic waves……?
a) Seismometer b) Seismograph c) Wind vane d) Barometer
12. The harmful changes brought in the environment by human activities are called -
a) Water conservation b) Air purification c) Pollution d) All of these
13. ....percent of our basic needs for food, shelter and clothing are fulfilled from land
a) Hundred b) Seventy c) Ninety-Five
Answers
Answer:
1)Dormant → Dormant volcanoes are volcanoes that have not erupted in a long time but are expected to erupt again in the future.
3)Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form.
4) rotation of earth on it's axis
5)Soil erosion occurs when the water with high velocity runs down washing the soil.
6)Sedimentary rocks form by breaking down other kinds of rocks into small particles and washing or blowing them away; metamorphic rocks form from other rocks and igneous rocks form by melting other rocks.
7)An ecosystem (also called as environment) is a natural unit consisting of all plants, animals and micro-organisms (biotic factors) in an area functioning together with all of the non-living physical (abiotic) factors of the environment.
8)Granite is an igneous rock that is composed of four minerals. These minerals are quartz, feldspar, mica, and usually hornblende. Granite forms as magma cools far under the earth's surface.
9)Some human activities that cause damage (either directly or indirectly) to the environment on a global scale include population growth, overconsumption, overexploitation, pollution, and deforestation, to name but a few.
10)noise pollution
11)seismographs
A seismograph, or seismometer, is an instrument used to detect and record seismic waves
12)Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation
13)Ninety-five per cent of our basic needs forfood, shelter and clothing are obtained from LAND.
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