PRAL
1. Briefly explain the various levels of organization of a pond ecosystem.
2. How are the biotic elements of an ecosystem linked to one another?
3. Without the complex interaction between the biotic elements and
atmosphere, life would not have been existed on the earth-Justify the
statement
4. Any increase or decrease in the population of any one species in an
ecosystem has an effect on the population of other species-Explain with
example
5. In what way do you think an oil spill in a water body will have an effect on
the biotic elements living in that ecosystem?
6. Sun is the source of energy for all living beings, Justify.
7. Why is the existence of decomposers essential in nature?
8. Arrange the following elements in order of their level of organisation:
Ecosystem, biosphere, community, population
9. With the help of a graphic organiser, depict the different types of biotic
elements, give one characteristic feature and example of each element.
10. Which one of the following is not a part of the biotic community and why?
Water, algae, fish, bacteria
11. How, according to you, do water and soil play an important part in an
ecosystem?
12. With the help of an example, describe how plants interact with the
physical environment around them.
Answers
Answer:
breath, etc.
Underline the prepositional phrase in the following sentences as shown in the example.
Please hand me the pen next to the telephone.
Put this on the shelf.
The dog ran after the rabbit.
Come to the market with me.
5. Park the car beside that fence.
6 Stand under the tree to feel cool.
2. Anold woman sat at the front of the bus.
8. Alarge fire was burning near the market.
9. Who went around the world in eighty days?
10. The computer on the table is a new model.
II. The children listened carefully to their parents.
.
outoft
1
1
4
2. The house near the post office needs painting.
3. Upon my arrival, I was welcomed with an award.
I can't complete the project without your help.
J7
Explanation:
breath, etc.
Underline the prepositional phrase in the following sentences as shown in the example.
Please hand me the pen next to the telephone.
Put this on the shelf.
The dog ran after the rabbit.
Come to the market with me.
5. Park the car beside that fence.
6 Stand under the tree to feel cool.
2. Anold woman sat at the front of the bus.
8. Alarge fire was burning near the market.
9. Who went around the world in eighty days?
10. The computer on the table is a new model.
II. The children listened carefully to their parents.
.
outoft
1
1
4
2. The house near the post office needs painting.
3. Upon my arrival, I was welcomed with an award.
I can't complete the project without your help.breath, etc.
Underline the prepositional phrase in the following sentences as shown in the example.
Please hand me the pen next to the telephone.
Put this on the shelf.
The dog ran after the rabbit.
Come to the market with me.
5. Park the car beside that fence.
6 Stand under the tree to feel cool.
2. Anold woman sat at the front of the bus.
8. Alarge fire was burning near the market.
9. Who went around the world in eighty days?
10. The computer on the table is a new model.
II. The children listened carefully to their parents.
.
outoft
1c cjfkfjtktiti
1
4
2. The house near the post office needs painting.
3. Upon my arrival, I was welcomed with an award.
I can't complete the project without your help.