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Important Questions Test: Forests Our Lifeline - Class 7 MCQ


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15 Questions MCQ Test Science Class 7 - Important Questions Test: Forests Our Lifeline

Important Questions Test: Forests Our Lifeline for Class 7 2024 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 2024 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

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

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

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 2

If forests disappear

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

Amount of CO2  in air will increase

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Important Questions Test: Forests Our Lifeline - Question 3

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 3
  • 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 4

Which of the following is incorrect?

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

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

Important Questions Test: Forests Our Lifeline - Question 5

Select the chain that contains primary consumers.

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

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 6

Which of the following is influenced by forests?

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

Temperature, Climate and Animals all are influenced by forests

Important Questions Test: Forests Our Lifeline - Question 7

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 7

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 8

Which one of the following is an animal product?

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

Answer: (c) Honey

Important Questions Test: Forests Our Lifeline - Question 9

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

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

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 10

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

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 10
  • The correct answer is option D: Willow.
  • Cricket bats are traditionally made from a specific type of wood called willow.
  • Willow wood is known for its unique properties that make it ideal for making cricket bats.
Important Questions Test: Forests Our Lifeline - Question 11

Why are forests often referred to as "green lungs"?

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 11
  • Forests are often called "green lungs" because they help us breathe by releasing oxygen into the air through a process called photosynthesis.
  • Just like how our lungs help us breathe in oxygen, forests provide oxygen for animals and humans to breathe and stay healthy.
  • So, forests are like our planet's lungs, giving us the fresh air we need to live and thrive.
Important Questions Test: Forests Our Lifeline - Question 12

What helps a forest to grow and regenerate ?

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 12
  • In the forest, animals play a big role in helping it grow and renew. They scatter seeds and give nutrients for the plants to grow big and strong.
  • Think of it like how your toys need care to stay nice and new - the forest needs help too, and animals are like its caretakers, making sure it stays healthy and green.
Important Questions Test: Forests Our Lifeline - Question 13

State whether the following statement is True or False:

The forest canopy intercepts raindrops, allowing most of the water to come down through the branches and stems of trees.

Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 13
  • When it rains in the forest, the uppermost layer of the forest canopy stops the raindrops. This means most of the water comes down through the branches and stems of the trees.
  • This is like a big umbrella made by the trees to keep the rain from directly hitting the ground.
  • So, the statement is True.
Important Questions Test: Forests Our Lifeline - Question 14

Forests help maintain the __________ throughout the year.

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

The forests help keep the water table steady throughout the year. This means they help ensure that there is always enough water underground for us to use.

Important Questions Test: Forests Our Lifeline - Question 15
Why is there no waste in a forest?
Detailed Solution for Important Questions Test: Forests Our Lifeline - Question 15
In a forest, waste materials decompose and are recycled back into the ecosystem, thanks to decomposers. This natural process ensures that nutrients are continuously reused, preventing the accumulation of waste.
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