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Important Questions Test: Forests Our Lifeline


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20 Questions MCQ Test Science Class 7 | Important Questions Test: Forests Our Lifeline

Important Questions Test: Forests Our Lifeline for Class 7 2022 is part of Science Class 7 preparation. The Important Questions Test: Forests Our Lifeline questions and answers have been prepared according to the Class 7 exam syllabus.The Important Questions Test: Forests Our Lifeline MCQs are made for Class 7 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions Test: Forests Our Lifeline below.
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Important Questions Test: Forests Our Lifeline - Question 1

The branchy part of a tree above the stem is called:-

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 1

The tree crown is the top part of the tree, which features branches that grow out from the main trunk and support the various leaves.

Important Questions Test: Forests Our Lifeline - Question 2

Find the missing link Grass→insect→frog→______→eagle

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 2

Grass is eaten by insects.Insects are eaten by frog which is then eaten by snakes.Eagles are prime snake hunters and specifically target snakes.

Important Questions Test: Forests Our Lifeline - Question 3

A forest consists of

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 3

A forest consists of animals, plants and floor converted with dead and decaying matter.
Decomposers recycle and convert the dead matter into humus which mixes with forest soil and provide nutrients to plants.

Important Questions Test: Forests Our Lifeline - Question 4

Microorganisms produce ________ by acting upon the dead plants.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 4

Humus is formed by the decomposing action of soil microorganisms.

Important Questions Test: Forests Our Lifeline - Question 5

Identify the wrong statement.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 5

plants and animals in a forest are not dependent on each other.

Important Questions Test: Forests Our Lifeline - Question 6

Forests are also called

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 6

Forests are called green lungs because it consists of trees which have Green Leaves the leaves taking carbon dioxide give out oxygen

Important Questions Test: Forests Our Lifeline - Question 7

Floods can be controlled by

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 7

Forests allow the water to go into the soil. They also prevent the extreme water run-off and hence prevents landslides & topsoil erosion. Most of the flooding disasters are caused by deforestation.

Important Questions Test: Forests Our Lifeline - Question 8

Mushrooms eat ______

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 8

Mushrooms eat humus.

Important Questions Test: Forests Our Lifeline - Question 9

Which of the following is not a forest product?

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 9

Kerosene is an oil distillate commonly used as a fuel or solvent.While kerosene can be extracted from coal, oil shale, and wood, it is primarily derived from refined petroleum.

Important Questions Test: Forests Our Lifeline - Question 10

If forests disappear

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 10

Amount of CO2  in air will increase

Important Questions Test: Forests Our Lifeline - Question 11

Disappearance of forests will lead to increase in amount of carbon dioxide in air. It is likely to result in

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 11

Increase in carbon dioxide will result in global warming.The surplus carbon is stored in the plant, helping it to grow. When trees are cut down and burned or allowed to rot, their stored carbon is released into the air as carbon dioxide. And this is how deforestation and forest degradation contribute to global warming.

Important Questions Test: Forests Our Lifeline - Question 12

Which of the following is incorrect?

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 12

The average temperature in tropical rainforests ranges from 70 to 85°F (21 to 30°C).

Important Questions Test: Forests Our Lifeline - Question 13

Select the chain that contains primary consumers.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 13

The second trophic level in the ecosystem consists of organisms that eat the producers (green plants). 
These are called primary consumers, or herbivores. Deer, rabbit, turtles, elephants and many types of birds are herbivores. 

Important Questions Test: Forests Our Lifeline - Question 14

Select the one that is not a forest product.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 14

The correct option is Option D.
Any product or substances which is obtained from the forestation for direct consumption or commercial use are said to be a forest product. Gums are obtained from the woody elements of plants or in seed coatings. From the thin layers or the pile of wood, plywood is manufactured. Sealing wax is made from beeswax. So, these are the products of the forest. Kerosene is not the forest product because it is a fossil fuel.

Important Questions Test: Forests Our Lifeline - Question 15

Micro-organisms act upon dead plants to produce

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 15

They produce humus. 

Important Questions Test: Forests Our Lifeline - Question 16

An animal which feeds on dead organisms is a

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 16

Scavengers are animals that consume dead organisms that have died from causes other than predation.

Important Questions Test: Forests Our Lifeline - Question 17

Some herbs and plants that were used in ancient times for making drugs and are even now used for the same purpose. Which of the following is not one of these?

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 17

Marigold  has been used to treat a variety of ailments affecting the skin as well as infections and fungus.

Important Questions Test: Forests Our Lifeline - Question 18

A tree species in Mauritius failed to reproduce because of extinction of a fruit eating bird. The bird was

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 18

The dodo is an extinct species of flightless bird from Mauritius.

Important Questions Test: Forests Our Lifeline - Question 19

Select the country that is the largest producer of fuel wood in the world.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 19

Fuelwood has remained the principal component of rural domestic energy in India and in most developing countries.In India, the land under cultivation increased from 118 million in 1951 to 142 million ha by 1987. This expansion also included the diversion of about 4.5 million ha of forests to agriculture.

Important Questions Test: Forests Our Lifeline - Question 20

The cricket bats are made out of wood of which of the following?

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