☀️Ecology - Pollution/recycling🗑

Question 1

Carbon

Answer 1

Forms part of all organic nutrients, carbohydrates, fats and proteins

Question 2

Carbon dioxide is removed from the environment by

Answer 2

Photosynthesis

Question 3

Carbon dioxide is returned to the environment by

Answer 3

Respiration (in plants animals and microorganisms)
Decay (caused by micro organisms
Combustion

Question 4

Eg of combustion

Answer 4

Burning fossil fuels

Question 5

What do all organisms need nitrogen for

Answer 5

Protein
DNA
RNA manufacture

Question 6

What percent of the earths gas is nitrogen

Answer 6

78%

Question 7

What happens to animals protein when they die

Answer 7

Converted to ammonia by bacterial decomposition

Question 8

Nitro fixing bacteria

Answer 8

Convert nitrogen to gas nitrates

Question 9

Bacteria and fungi of decay

Answer 9

Convert dead organic matter into nitrogenous waste

Question 10

Nitrifying bacteria

Answer 10

Converts nitrogenous waste into nitrates

Question 11

Denitrifying bacteria

Answer 11

Convert nitrates into nitrogen waste

Question 12

3 ways in which humans affect ecosystems are:

Answer 12

Pollution
Conservation
Waste management

Question 13

Pollution

Answer 13

Any harmful addition to the environment. Caused by pollutants

Question 14

Ozone depletion

Answer 14

Is an example of air pollution

Question 15

Conservation problems in fishing

Answer 15

Water pollution

Use of nets with small mesh sizes

Question 16

Eutrophication

Answer 16

Is the addition of nutrients to fresh water. This leads to last of oxygen in water

Question 17

Ex of good conservation practices

Answer 17

Use of large mesh nets in fishing

Question 18

Waste management

Answer 18

Involved preventing pollution and conserving the environment

Question 19

Problems in waste disposal

Answer 19

Waste may cause disease
Incinerators may release toxic fumes
Dumping at sea may lead to pollution at sea

Question 20

Micro organisms

Answer 20

Break down of organic waste in landfill sites

Eg bacteria and fungi

Question 21

Amount of waste we produce can be controlled by

Answer 21

Reduce
Reuse
Recycle

Question 22

Stages of the Sewage treatment

Answer 22

Primary treatment
Secondary treatment
Tertiary treatment

Question 23

Primary (physical) treatment

Answer 23

Removes particles from waste by screening and sedimentation

Question 24

Secondary (biological) treatment

Answer 24

Bacteria and fungi break down organic waste

Question 25

Tertiary treatment

Answer 25

If used, removes minerals from waste

Question 26

Benefits of conservation

Answer 26

Prevents the organism from becoming extinct

Maintains balance of nature