Unit. 1

In this unit we deal with:

1. The concept, characteristics and different types of ecosystems.

2. The main different relationships that take place in ecosystems (food chains, competition, cooperation).

In this unit we deal with:

1. ROCKS: Concept and characteristics, and uses of rocks.

2. MINERAL: Concept and properties, and uses of minerals

3. SOILS: Concept, how it is formed, and the soil layers.