Human Impact On The Environment

Question 1

Why has there been an increase in intensive farming methods?

Answer 1

Because farmers have had to start producing more food, within the same area of land

Question 2

Describe the impact of intensive farming on biodiversity

Answer 2

Intensive farming requires the use of many different types of chemicals, including fertilisers and pesticides, which can have a negative impact on the environment and therefore biodiversity

Question 3

What is bioaccumulation?

Answer 3

When organisms are exposed to pesticides they can be taken in and stored in the bodies of the organisms. Of the practices is stored faster than removed then overtime the pesticide concentration will increase.

Question 4

What is biological control?

Answer 4

The process in which a non pest organism is used to control the population of a pest organism

Question 5

Name 2 alternatives to pesticides

Answer 5

Biological control

Genetic engineering

Question 6

What are fertilisers?

Answer 6

Chemicals which are used to replace or increase the concentration of nutrients (nitrate) in the soil needed for plant growth.

Question 7

What is leaching?

Answer 7

Fertiliser leaching is excess fertiliser moving out of the soil in a field to a fresh water ecosystem

Question 8

What is an algal bloom?

Answer 8

An algal bloom is the rapid, uncontrolled growth of algae caused by fertiliser leaching.

Question 9

What are the effects of an algal bloom?

Answer 9

Algae die and bacteria in the water use dead material for food.

Bacteria uses up all the oxygen for respiration and the oxygen concentration of the water decreases.

Biodiversity decreases.

Question 10

What is an indicator species?

Answer 10

Any organism taut gives you information about levels of pollution by its presence or absence

Question 11

Why do we need to produce more food?

Answer 11

Because the Human population of the planet is increasing