unit 2: ecosysten Natural Science for 5th grade

1. ECOSYSTEM
unit 2 for 5th grade students

2. WHAT IS A ECOSYSTEM?
An ECOSYSTEM has got three components:
1. The biotope ( non-living components)
2. The biocenosis (living components)
3. The relationships in an ecosystem.
A. aquatic
B. land
C. mixed

3. FEEDING RELATIONSHIPS

4. OTHER RELATIONSHIPS
Relationships between the same species
1. Gregarious association
2. Families
3. Societies
Relationships between different species
• Mutualism
• Parasitism
• Commensalism

5. HOW LIVING BEINGS ADAPT
Anatomical adaptations
Behavioural adaptations

6. HUMANS AND ECOSYSTEM
overexploit resources
pollute
transform the environment
we distribute sources poorly.