1. Chapter 5, Lesson 1 Interactions in an Ecosystem
abiotic factor
biotic factor
population
community
ecology
habitat
niche
producer
decomposer
consumer
topsoil
humus

2. ecosystem – all the living and non-living things in an area
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3. abiotic factor – the non-living parts of an ecosystem
minerals
water
light
air
temperature
soil

4. biotic factor – the living parts of an ecosystem
animals
plants
protists
bacteria
fungi

5. population – all the organisms of the same species living in an area

6. community – all the populations living in an area

7. ecology – the study of how all things in an ecosystem interact
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8. habitat – the place where an organism lives
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9. niche – the role of an organism in its community
What does the species eat?
What eats the species?
What environment does the species need?
Is the species active by night or by day?
NO TWO SPECIES CAN FILL THE SAME NICHE!

10. producer – an organism that produces oxygen and food like plants and algae

11. consumer – animals are consumers
consumer – animals are consumers. They eat algae, plants, or other animals.

12. decomposer – organisms, such as bacteria, fungi, and worms that break down dead plants and animals into useful things like minerals that enrich the soil.

13. topsoil – the top layer of soil

14. humus – partly decayed plant matter