Competition and Environmental Change

Question 1

What do plants need from their environment?

Answer 1

Light, space, water and minerals (nutrients) from the soil

Question 2

What do animals need from their environment?

Answer 2

Space (territory), food, water and mates

Question 3

Organisms compete with [ ] (and members of their own species) for the same [ ]

Answer 3

other species

resources

Question 4

Environmental changes are caused by either [ ] factors or [ ] factors

Answer 4

Living and non-living

Question 5

Describe how living factors change the environment

Answer 5

1) A change in the occurrence of infectious diseases
2) A change in the number of predators
3) A change in the number of prey or the availability of food sources
4) A change in the number of types of competitors

Question 6

Describe how non-living factors change the environment

Answer 6

1) A change in average temperature
2) A change in average rainfall
3) A change in the level of air or water pollution

Question 7

In which 3 ways can environmental changes affect animals and plants?

Answer 7

1) Population size increase
2) Population size decrease
3) Population distribution changes

Question 8

Give an example of what causes Population size increase

Answer 8

If the no. of prey increases, then there’s more food available for predators, so more predators survive and reproduce, and their numbers increase too

Question 9

Give examples of what causes Population size decrease in bees

Answer 9

1) Some pesticides may be having a negative effect on bees
2) There’s less food available - there aren’t as many nectar-rich plants around
3) There’s more disease - new pathogens or parasites

Question 10

Give an example of what causes Population distribution changes

Answer 10

A change in where an organism lives. Could be caused by a change in temperature