Page 20 - prim 5 booklet 2025 Summary hajar_Neat 3

Delta Modern Language Schools
Science department
Grade 5
1st term 2024 -2025

• What will happen to microorganisms if water becomes warm?

Microorganisms will move to area where water is cooler, so small fish that feed on them will
also move to a new habitat, and then seabirds will not have a food, so some of them go to
new habitat while others will die.

Habitat loss

• Give reason: Healthy habitats are important to all organisms in the food web?

Because they provide organisms with resources that they need to survive as air, food, water
and shelter.

• What happens when habitats are destroyed?

Different organisms may not be able to survive and this will negatively affect the flow of
energy in the food web.

• Notes

1. From human activities that change the habitats in an ecosystem are:
➢ Building up more buildings and roads.
➢ Throwing waste materials in water.
➢ Overfishing in seas and oceans.

2. Human activities can also impact the weather and nonliving factors in an ecosystem
such as the temperature of ocean water.
3. All of these changes can cause habitat loss which is one of the main causes of extinction.

• Importance of coral reefs:

1- Coral reefs provide food and shelter for large
numbers of fish and other marine organisms. They
are important for tourism, which increase income.

20