Page 4 - Science B.B Prim.5 concept 2&3 t.1 e-book _2024-2025. - Copy (1)_Neat

U1 Concept 2 Energy
Flow

Ecosystem: is any natural area including living organisms

and non-living things interact with each other.
The components of ecosystem:

1- Living organism as plants or animals.
2- Non-living things as air, water and soil.

Ecosystems are classified according to their size into:

1. Small as an area of land or a water pond.
2. Large as a forest, a desert, a tundra or an ocean.
3. Very large as the Universe that is considered a unified

ecosystem.

Animals don’t choose their food according to its taste but
according to their bodies need to survive.

First Term 20