SB9c-d

Question 1

What are abiotic factors?

Answer 1

The non-living components/conditions that impact an ecosystem.

Question 2

What are some examples of abiotic factors?

Answer 2

• Type of soil
• Sunlight
• Water/rain/moisture
• pH of soil
• Temperature
• Wind

Question 3

What do abiotic factors affect and why?

Answer 3

They affect the distribution of organisms in an area. This is because all organisms are adapted to survive and live in a certain environment and if the abiotic factors change, the organisms will not be able to cope with the change and will either die or migrate.

Question 4

How do we measure the distribution of organisms in an area?

Answer 4

Using quadrats in a belt transect (systematic sampling).

Question 5

What are pollutants?

Answer 5

Substances that cause harm to the environment and affect the distribution of organisms.

Question 6

What are biotic factors?

Answer 6

The living organisms in an ecosystem.

Question 7

What are some examples of biotic factors?

Answer 7

• Predation
• Disease
• Competition

Question 8

How can humans control the population of a species?

Answer 8

Introducing a new predator in a species’ habitat will decrease the number of prey and increase the number of predators.

Question 9

What is the predator-prey cycle?

Answer 9

1. The number of both predator and prey will increase and decrease alternately
2. When the predators are in the area they will eat the prey at a given time and the prey numbers will decrease
3. Since they have enough food, the predators can survive and breed to increase in population
4. The predators will be eating a lot more prey and the prey numbers will decrease a lot more
5. The predators won’t have enough food available and they will starve to death leading to a decrease in population
6. At that time, the prey will have the advantage to survive and breed to increase in population again