Important Questions Test: Forests Our Lifeline - Class 7 MCQ

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.

Amount of CO₂  in air will increase

• 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.

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

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. 

Temperature, Climate and Animals all are influenced by forests

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

Answer: (c) Honey

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.

• 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.

• 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.

• 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.

• 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.

Forests play a crucial role in maintaining various environmental factors:

• Temperature: Forests regulate temperature by providing shade and releasing moisture through transpiration, which cools the air.
• Water Table: They help maintain the water table by facilitating the infiltration of rainwater into the ground.
• Rainfall: Forests contribute to the water cycle by releasing moisture into the atmosphere, which can increase local rainfall.

Therefore, forests help maintain all of these elements, making D: All of the above the correct answer.