1. Interactions and Ecosystems
Science 7
Interactions and Ecosystems

2. Ex) animals, plants, bacteria, fungi Abiotic = non-living things
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Biotic = living things
Ex) animals, plants, bacteria, fungi
Abiotic = non-living things
Ex) particles, rocks, water, air, temperature

3. What are some other examples?
Topic 1 Pg 6-17
Ecosystem: all the interacting parts of a biological community and its environment. The relationship between living organisms and their environment.
Example: A deer eating the grass, owl living in a tree, ant digging in the soil
What are some other examples?

4. Ecology
Ecology: study of how organisms interact with each other and their environment
Ecologist: scientist who studies interactions between abiotic and biotic parts of the environment

5. 4 Things that Living Things NEED
Air (Oxygen)
Water
Food
Shelter/habitat
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6. Living things exchange gases.
1. Air
1. Air
Living things exchange gases.
Ex) Most organisms breathe in O2 and breath out CO2. Plants need carbon dioxide to make food and give off oxygen.

7. 60% of your body is made up of water
Living things need water, living things will eventually die without water.
60% of your body is made up of water
Cells NEED water, and live in a watery environment
How do humans get their water? What about plants?

8. 3. Food
You need ENERGY for basic functions. Animals get their energy by eating food that the plants produce.
Foods contain nutrients such as:
Carbohydrates
Lipids (fats)
Proteins
Vitamins
These things help with growth, repair, and reproduction.
Example: We eat the 4 food groups. Where do plants get their energy.

9. Example: Beavers making a dam, what else?
4. Shelter
Organisms need places to protect themselves from the external environment and create a habitat to live in.
Example: Beavers making a dam, what else?

10. Adaptation
Adaptation: an inherited characteristic that helps an organism survive and reproduce in its Environment. Ex. Duck's webbed feet helps them to increase the surface area to paddle in water and avoid sinking n mud. What else? Whales?

11. How do organisms interact with their environment
What’s an ecosystem? Symbiosis: Two species that live together in a relationship that lasts over time. There are three types of symbiosis: mutualism, parasitism, and commensalism.

12. mutualism
Mutualism: relationship between two different organisms where each partner benefits from the relationship. Example: A remora (small fish) attaches itself to the shark's skin and eats bacteria and microorganisms that are unhealthy for the shark. This is an example of a symbiotic relationship called mutualism.

13. Parasitism
Parasitism: Relationship in which one organism benefits and the other is harmed. Parasite: Meets its needs at the expense of the other organism and feeds on it. Host: The organism the parasite is feeding on. Example: Tapeworms are common parasites that live inside animals' intestines. (This is why dogs are "dewormed)

14. Commensalism
Commensalism: relationship in which one partner benefits and the other doesn't seem to be affected by it. Example: Barnacles that live on whales.

15. Impacts of ecosystems
All organisms have some sort of impact when they interact with their ecosystems. Example: Beaver cutting down trees to make a dam. What else?

16. Review
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