Human influences on ecosystems B13

Question 1

photosynthesis

Answer 1

take in carbon dioxide and release oxygen

Question 2

combustion

Answer 2

burning a fuel reacting with oxygen

Question 3

decomposer

Answer 3

use carbon compounds they absorb from respiration

Question 4

carbon cycle

Answer 4

cycle of carbon CO2 > photosynthesis > death, feeding, respiration, combustion >CO2

Question 5

green house effect

Answer 5

sun emits radiation. this gets trapped due to GH gases, and raise global temperature

Question 6

carbon monoxide poisoning

Answer 6

carbon dioxide lacks oxygen when formed, and produces carbon monoxide instead, which is poisonous

Question 7

sulfur dioxide

Answer 7

forms acid rain

Question 8

eutrophication

Answer 8

fertilizers (nitrate, phosphate, potassium) running into water sources, making them leach, eventually killing organisms

Question 9

stages of eutrophication

Answer 9

fertilizer adds in water > rapid algae growth > plants die from lacking light > bacteria uses oxygen > other animals die due to lack of oxygen

Question 10

deforestisation

Answer 10

trees are cut down