Our environment Worksheet

Our environment Worksheet-4

1. In the following food chain 20 J of energy was available to the hawks. How much would have been present in the plants?

Plants → Rats → Snakes → Hawks

A. 20 J                B. 200 J             C. 2000 J          D. None of these

2. In a food chain comprising lion, grass and deer, which will transfer the maximum amount of energy?

A. lion                 B. grass              C. deer

Our environment Worksheet-5

1. What is meant by the term 'Environment'?

2. Name any two non-biodegradable wastes.

3. Name any two biodegradable substances.

4. Which of the following are biodegradable?

(a) Wool, glass, silver foil, leather.

(b) Leather shoe, Earthen pot, Silver spoon, Jute bag.

(c) Tomato leaves, Aluminium wire, Synthetic fibre, Wool.

Our environment Worksheet-6

21. Which of the following belong to the first trophic level:

(a) Grasshopper, Rose plant, Neem tree, Cockroach.

(b) Sunflower plant, Grasshopper, Cockroach, Banyan tree.

(c) Sunflower plant, Grasshopper, Rose plant, Cockroach?

22. Which of the following belong to the second trophic level:

(a) Frog, Butterfly, Spider, Rice weevil?

(b) Parrot, Frog, Butterfly, Spider?

23. State one difference between autotrophs and heterotrophs.