Question

1. Biotic environment includes

(a) Producers (b) Consumers

(c) Decomposers (d) All the above

2. Decomposers include

(a) Bacteria (b) Fungi

(c) Both a & b (d) Animals

3. Abiotic environment does not include

(a) Air (b) Water

(c) Soil (d) Plants

4. Which one the following is not biodegradable?

(a) Vegetables (b) Fruits

(c) Earthworm (d) Aluminum foil

5. Air pollution is caused by

(a) Insecticides (b) Sewage

(c) Smoke (d) Loud speakers

6. The sphere which contains gases that surrounds the planet?

(a) Atmosphere (b) Lithosphere

(c) Hydrosphere (d) Ionosphere

7. Which of the following sphere contains vertical air currents?

(a) Stratosphere (b) Mesosphere

(c) Troposphere (d) Thermosphere

8. Which of the following layer protects earth from harmful UV rays?

(a) Exosphere (b) Ozone

(c) Hydrosphere (d) Meteors

9. Chief source of energy in environment is

(a) Fire (b) Moon

(c) Sun (d) Stars

10. When trees are cut, amount of oxygen

(a) Decreases (b) Increases

(c) Both (a) and (b) (d) Remains same​

Answer 1

1) d - ALL OF THE ABOVE
2) a - BACTERIA
3) d - PLANTS
4) d - ALUMINIUM FOIL
5) c - SMOKE
6) a - ATMOSPHERE
7) a - STRATOSPHERE
8) b - OZONE
9) c - SUN
10) a - DECREASES