Practice

Nature's Treasures — Practice

15 questions 15 min Recall + understand

Q1. The air which surrounds the Earth is best described as
- A. A single pure gas
- B. A mixture of gases
- C. A liquid
- D. Only water vapour
Q2. In the composition of air shown in Fig. 11.1, the percentage of nitrogen is
- A. 21%
- B. 1%
- C. 78%
- D. 50%
Q3. According to Fig. 11.1, the percentage of oxygen in air is approximately
- A. 78%
- B. 21%
- C. 1%
- D. 0%
Q4. Moving air is called
- A. Wind
- B. Storm only
- C. Breeze only
- D. Steam
Q5. Water covers approximately what fraction of the Earth's surface?
- A. One-tenth
- B. One-half
- C. Two-thirds
- D. Three-fourths
Q6. Collecting and storing rainwater in large quantities for later use is called
- A. Water pollution
- B. Rainwater harvesting
- C. Evaporation
- D. Sedimentation
Q7. On Earth, the main source of energy for all living beings is
- A. The Moon
- B. The wind
- C. The Sun
- D. Coal
Q8. Solar panels on rooftops, street lights or traffic signals capture the Sun's energy and produce
- A. Petrol
- B. Electricity
- C. Coal
- D. Natural gas
Q9. Ajji explains to Bhoomi and Surya that large areas with dense growth of various types of plants are called
- A. Deserts
- B. Forests
- C. Grasslands
- D. Gardens
Q10. Van Mahotsav, the week-long event during which new plants and trees are planted across the country, is celebrated in the month of
- A. January
- B. March
- C. July
- D. October
Q11. Soil is formed by the disintegration (breaking apart) of rocks by the actions of
- A. The Sun, water and living organisms over a long time
- B. Vehicles and machines in a short time
- C. Plastic and waste materials in a few months
- D. Fire only, within a few days
Q12. Which of the following rocks is shown being used for roofing in Fig. 11.6?
- A. Granite
- B. Sandstone
- C. Slate
- D. Marble
Q13. Petrol, diesel and kerosene are obtained from
- A. Coal
- B. Natural gas
- C. Wood
- D. Petroleum
Q14. The resources that we get from nature are called
- A. Natural resources
- B. Human-made resources
- C. Machine resources
- D. Industrial resources
Q15. Resources that get renewed, replenished or restored by natural processes within a reasonable period of time are called
- A. Non-renewable resources
- B. Human-made resources
- C. Renewable resources
- D. Fossil resources

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