EASY
Lower Secondary Stage 9
IMPORTANT
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Choose two decomposers from the following:

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Important Questions on Ecology

EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 1>Q 10
Explain how decomposers help plants.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 2>Q 1

Complete the table to show what resources organisms need to survive. Add one cross (X) to each row. The first row has been done for you.

Resource Plants Animals Both plants and animals
Sunlight X    
Water      
A source of food      
Carbon dioxide      

 

EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 2>Q 4

The barrel cactus grows in the desert. The plant is adapted to live in the desert. Explain how each adaptation helps the barrel cactus to survive.

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Large swollen stem: _____

EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 2>Q 4

The barrel cactus grows in the desert. The plant is adapted to live in the desert. Explain how each adaptation helps the barrel cactus to survive.

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Thick spines rather than leaves: _____

MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 2>Q 5
Many animals hibernate during the winter. Explain how this helps them to survive.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 2>Q 6

Scientists observe a group of fennec foxes in the Sahara desert. The foxes hunt at night and rest in burrows during the day.

Suggest how these behaviours could help the fennec fox survive in the desert.

HARD
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 3>Q 2
Name one physical factor that could limit a plant population at the bottom of the lake.
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 3 - Ecology>Exercise 3>Q 3

The graph shows how the human population has changed since 1800.

Question Image

Which two of the following are possible reasons for the changes in the human population size. choose the correct answer.