Write one or two words for each of the following. statements/definitions :

(a) Each level of the food chain where the transfer of energy takes place.

(b) The physical factors like temperature, rainfall, light, soil, air and water of an ecosystem.

(c) Organisms which depend on the producers for food either directly or indirectly.

(d) The physical and biological world where we live in.

(e) The self-contained unit of living things and their non-living environment needing only sunlight for its functioning.

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Solution

(a) Trophic level
(b) Abiotic components
(c) Consumers
(d) Environment
(e) Ecosystem

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Fill in the blanks.

1. Living things in the environment are ……………. factors.

2. Biotic factors, abiotic factors and their interactions with one another form an ………….. .

3. …………… itself is one large biome.

4. The number of biotic factors in an ecosystem is decided by …………….. .

5. Green plants in the living world are …………….. .

6. Organisms that depend directly on autotrophs are known as …………. or ……….… .

7. Detritivores feed upon …………. of living things.

8. Each level in a food chain is called a …………….. .

All living things are dependent on plants for their energy directly or indirectly. True or false?

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