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Forests: Our Lifeline Practice Questions

Class 7 · Science · 1198 free MCQs with instant results and detailed explanations.

1198
Total
369
Easy
584
Medium
245
Hard

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Topics in Forests: Our Lifeline

Deforestation 395
Products of Forest 392
Forest Ecosystem 411

Sample Questions from Forests: Our Lifeline

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which of the following is NOT a benefit provided by forests in our ecosystem?
A. Absorbing carbon dioxide
B. Preventing soil erosion
C. Producing oxygen
D. Creating artificial light
Show Answer & Explanation
Correct Answer: D
Forests provide numerous benefits such as absorbing carbon dioxide, preventing soil erosion, and producing oxygen. However, creating artificial light is not a natural function of forests.
Q2
Easy
Which of the following is NOT a part of a forest ecosystem?
A. Trees
B. Animals
C. Rivers
D. Buildings
Show Answer & Explanation
Correct Answer: D
Buildings are human-made structures and do not form part of the natural forest ecosystem.
Q3
Easy
Which layer of the forest is known for having the most diverse plant and animal life?
A. Forest floor
B. Canopy
C. Understory
D. Emergent layer
Show Answer & Explanation
Correct Answer: B
The canopy layer receives plenty of sunlight and hosts a wide variety of plants and animals.
Q4
Medium
What is the primary role of trees in a forest ecosystem?
A. Providing oxygen
B. Holding soil
C. Providing shade
D. All of the above
Show Answer & Explanation
Correct Answer: D
Trees provide oxygen through photosynthesis, hold soil in place, and create shade in forest ecosystems.
Q5
Medium
Which of the following is NOT a component of a forest ecosystem?
A. Soil
B. Water
C. Mountains
D. Trees
Show Answer & Explanation
Correct Answer: C
Mountains are physical landforms, while soil, water, and trees are direct components of a forest ecosystem.
Q6
Medium
What is the main reason forests are often called the 'lungs of the Earth'?
A. They provide food
B. They absorb carbon dioxide
C. They produce wood
D. They contain animals
Show Answer & Explanation
Correct Answer: B
Forests absorb carbon dioxide during photosynthesis and release oxygen, similar to how lungs function.
Q7
Medium
Which type of forest receives heavy rainfall throughout the year?
A. Deciduous forest
B. Tropical rainforest
C. Coniferous forest
D. Temperate forest
Show Answer & Explanation
Correct Answer: B
Tropical rainforests are known for their high levels of rainfall, often exceeding 2000 mm annually.
Q8
Hard
Which layer of the forest ecosystem is primarily responsible for photosynthesis?
A. Forest floor
B. Understory
C. Canopy
D. Emergent layer
Show Answer & Explanation
Correct Answer: C
The canopy layer, composed of tall trees, receives maximum sunlight, making it the primary site for photosynthesis in a forest.
Q9
Hard
What is the main role of decomposers in a forest ecosystem?
A. To produce food for plants
B. To recycle nutrients back into the soil
C. To provide shelter for animals
D. To compete with plants for sunlight
Show Answer & Explanation
Correct Answer: B
Decomposers break down dead organic matter, recycling nutrients back into the soil, which is essential for plant growth.
Q10
Hard
If a forest loses 30% of its trees, what is the approximate effect on biodiversity?
A. Biodiversity will double
B. Biodiversity will decrease
C. Biodiversity will remain unchanged
D. Biodiversity will only increase in tree species
Show Answer & Explanation
Correct Answer: B
The loss of trees directly impacts habitat availability, leading to a decrease in biodiversity as many species rely on trees for shelter and food.

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Forests: Our Lifeline — Class 7 Science Practice Questions Online

This page contains 1198 practice MCQs for the chapter Forests: Our Lifeline in Class 7 Science. The questions are organized by difficulty — 369 easy, 584 medium, 245 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 3 topics, giving you comprehensive coverage of the entire chapter.