MCQ Questions for class 7 Science Forests: Our Lifeline

Q1. What are decomposers?

1. Microorganisms that helps to decompose dead remains
2. The dead plants and animals
3. Microorganisms that feed on green plants
4. None of the above

Q2. Which of the following is received from forests?

1. Wax
2. Oxygen
3. Wood
4. All of the above

Q3. What is deforestation?

1. Growing more plants
2. Erosion of soil
3. Clearing of forests
4. None of the above

Q4. What are the causes of soil erosion?

1. Growing plants
2. Deforestation
3. Transpiration
4. Respiration

Q5. What is transpiration?

1. The excess water released by plants
2. The water stored by plants
3. The depletion of water table
4. The conversion of water into vapor

Q6. What is humus?

1. The chemical fertilizer
2. The mineral mixed with chemical
3. The black coloured substance decomposed by decomposers
4. All of the above

Q7. What is food chain?

1. A human made chain
2. The supply of food in market
3. The process of making food
4. A chain in which one animal eats other animal

Q8. Why forests are called our lifeline?

1. We get food to eat
2. We get oxygen to breath
3. We get fuel from it
4. All of the above

Q9. What is canopy?

1. The shade of trees
2. The roof of the house
3. The small grass in forest
4. The roof formed by the tall trees in forests

Q10. Which of the following is a medicinal plant?

1. Peepal
2. Babool
3. Sandalwood
4. Neem

Q11. Which of the following bears thorn?

1. Peepal
2. Babool
3. Shesham
4. Neem

Q12. Why forests are called lungs of the earth?

1. Because they are very busy
2. Because they balance the oxygen and carbon dioxide
3. Because they have lungs
4. None of the above

Q13. The decaying leaves and animal droppings in a forest enrich the

1. Forest
2. Soil
3. Water
4. All of the above