Page 14 - Science B.B Prim.5 concept 2&3 t.1 e-book _2024-2025. - Copy (1)_Neat

U1 Concept 3 Changes in Food Web

Ecosystem and food webs can be affected by many factors as:

Climate changes Pollution Human activities

Temperature or Water

Harms that happen to air, water or soil
by substances that can harm livings
organisms.

1- Overfishing when humans catch many fish.
2- Water pollution when humans throw wastes

in rivers, seas & oceans. 3-Building up.

Changes that may occur:

Plants were disappeared from an
ecosystem.

Consumers need to move other
places to search for food.

The number of 1 species of consumers
increases, the resources of food and

shelter may disappear, so they will die.

First Term 30