Chap. 12: Interactions with Ecosystems

Question 1

What are some Physical or abiotic factors?

Answer 1

• Air
• Water
• Temperature
• Light
• Minerals
• Acidity/Akalinity

Question 2

What is an ecosystem?

Answer 2

The interactions between a community and its physical environment

Question 3

What is an ecosystem made up of?

Answer 3

1. Organism- Adapted to the environment
2. Population- Organism of the same kind
3. Community- Different populations interacting and living in the environment
4. Ecosystem- Interactions between a community and its environment

Question 4

What are the ways of interrelationships in an ecosystem?

Answer 4

1. Predator-prey r/s
2. Mutualism
3. Parasitism

Question 5

What is mutualism?

Answer 5

R/s in which two or more organisms support and benefit each other

Question 6

What is parasitism?

Answer 6

Organism that causes harm to the host without killing it

Question 7

What are the ways the flow of energy and nutrients work in an ecosystem?

Answer 7

1. Photosynthesis
2. Respiration
3. Feeding

Question 8

Describe photosysnthesis

Answer 8

Process where glucose is produced using carbon dioxide and water in the presence of light
Green plants are producers, as they have chlorophyll found in chloroplasts to trap light

Question 9

Describe respiration

Answer 9

Process where food substances (Glucose) is broken down in the presence of oxygen to release energy used for growth, and storage as chemical potential energy

Question 10

What is flow of energy

Answer 10

At each stage, 90% of sun energy is lost through heat, therefore last organism of the food chain/web recieves least energy
Lost energy cannot be reused by produces
Flow of energy is therefore non-cyclical

Question 11

What is flow of nutrients?

Answer 11

It is passing of nutrients from the produces to decomposers to the environment.
Flow of nutrients in an ecosystem is cyclical