Our Environment Quiz

A village replaced its diesel water pumps with solar-powered ones. After a year, the air was fresher, and expenses went down. What is the MAIN reason for this improvement?

1. Solar panels are smaller in size
2. Diesel pumps were very noisy
3. Solar pumps do not burn fuel
4. The pumps ran faster

Answer: (c) Solar pumps do not burn fuel

Which setup shows clean, renewable energy converting to usable electricity with least pollution?

1. Petrol → Generator → Electricity
2. Solar panel → Battery → Fan
3. Windmill → Shaft → Water Pump
4. Diesel → Engine → Light

Answer: (b) Solar panel → Battery → Fan

A class performed an experiment using two model factories. Factory A had a short chimney. Factory B had a tall chimney. Both used the same fuel and released the same amount of smoke. After observing the experiment, a student said, “Taller chimneys reduce air pollution.” Which of the following best challenges the student’s claim?

1. Tall chimneys reduce noise but not gases
2. Tall chimneys stop smoke from rising
3. Tall chimneys spread smoke over a wider area but don’t reduce the amount
4. Only big factories pollute, not small ones

Answer: (c) Tall chimneys spread smoke over a wider area but don’t reduce the amount

A school science club is testing a homemade water filter. They layer the materials in this order: Gravel → Sand → Charcoal → Cotton What is the correct purpose of each?

1. Gravel filters chemicals, and cotton traps solids
2. Sand removes color, and charcoal traps large particles
3. Cotton removes odors, and gravel adds minerals
4. Charcoal absorbs impurities, and gravel blocks large particles

Answer: (d) Charcoal absorbs impurities, and gravel blocks large particles

Air Pollution Flowchart: Vehicles → Emission of gases → More oxygen → Breathing problems Which part is illogical in the flow?

1. Vehicles → Emission of gases
2. Gases → More oxygen
3. Emission → Breathing problems
4. Vehicles → Breathing problems

Answer: (b) Gases → More oxygen

Identify the main cause of pollution in these cases: 1. A road covered in thick dust from ongoing construction work. 2. Trees near a busy road have leaves covered in black soot.

1. 1–Vehicle smoke, 2–Construction dust
2. 1–Construction dust, 2–Vehicle exhaust
3. 1–Air conditioning, 2–Bonfire smoke
4. 1–Burning plastic, 2–Stagnant water

Answer: (b) 1–Construction dust, 2–Vehicle exhaust

Consider the following statements and choose the correct option: Statement 1: Switching off lights when not in use is a way to conserve energy. Statement 2: Energy conservation helps reduce pollution because less fuel is burned to generate electricity.

1. Both the statements are correct
2. Statement 1 is correct but Statement 2 is incorrect
3. Statement 1 is incorrect but Statement 2 is correct
4. Both the statements are incorrect

Answer: (a) Both the statements are correct

Consider the following statements and choose whether they are true or false. 1. The topsoil layer contains most of the nutrients and humus needed for plant growth. 2. The bedrock layer is soft and easily dug up by plant roots. 3. The subsoil layer is richer in minerals but poorer in humus than topsoil.

1. 1 – False, 2 – False, 3 – True
2. 1 – True, 2 – False, 3 – False
3. 1 – False, 2 – True, 3 – True
4. 1 – True, 2 – False, 3 – True

Answer: (d) 1 – True, 2 – False, 3 – True

Consider two hillsides – Hill A: Covered with grass and trees. Hill B: Bare, no vegetation. After rain, soil slides down Hill B, but Hill A remains intact. Based on this, which statement is most accurate?

1. Roots of plants help hold the soil in place and prevent erosion.
2. Hills without plants lose less soil because they absorb more water.
3. Rainwater cannot erode soil with no plants.
4. Soil erosion occurs only in forests.

Answer: (a) Roots of plants help hold the soil in place and prevent erosion.

Consider the following statements and choose the correct option 1. Sandy soil is best for growing water-loving crops like rice. 2. Loamy soil contains sand, silt, and clay in good balance. 3. Clayey soil becomes sticky when wet and cracks when dry

1. 1 – True, 2 – False, 3 – True
2. 1 – True, 2 – True, 3 – False
3. 1 – False, 2 – False, 3 – True
4. 1 – False, 2 – True, 3 – True

Answer: (d) 1 – False, 2 – True, 3 – True