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0654 B13 Impacts of Humans on Ecosystems Quiz

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Quiz for 0654 Coordinated Sciences on the impact of humans on natural ecosystems.
Jeffrey Piggott
Quiz by Jeffrey Piggott, updated more than 1 year ago
Jeffrey Piggott
Created by Jeffrey Piggott almost 6 years ago
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Resource summary

Question 1

Question
The diagram represents the carbon cycle. Which process is represented by arrow X?
Image:
Q5 (binary/octet-stream)
Answer
  • A combustion
  • B feeding
  • C photosynthesis
  • D respiration

Question 2

Question
The graph shows the increase in the human population of the world since 1630. What was the longest time taken for the population to double?
Image:
Q6 (binary/octet-stream)
Answer
  • A 100 years
  • B 200 years
  • C 300 years
  • D 400 years

Question 3

Question
The graphs show the number of carnivores in a habitat over a period of time. At time X the herbivores in their food chain are removed from the habitat. Which graph shows the effect of this on the number of carnivores?
Image:
Q21 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 4

Question
The diagram shows the positions of four farms and the concentrations of nitrate at different points in a river. Which farm is likely to have been using too much fertiliser on its land?
Image:
Q39 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 5

Question
The table shows some information about two closely related species of sea bird. Sewage pollution at the mouth of a river destroys its fish stocks. What is likely to happen to local populations of these birds?
Image:
Q40 (binary/octet-stream)
Answer
  • A There will be no change to either species.
  • B Species X numbers will decrease, species Y will remain constant.
  • C Species Y numbers will decrease, species X will remain constant.
  • D Both species numbers will increase.

Question 6

Question
Three human activities are listed. 1 burning fossil fuels 2 deforestation 3 overusing fertilisers Which activities can cause the change shown in the graph?
Image:
Q41 (binary/octet-stream)
Answer
  • A 1, 2 and 3
  • B 1 and 2 only
  • C 1 only
  • D 2 and 3 only

Question 7

Question
 What is reduced after deforestation?
Answer
  • A force of rain hitting the ground
  • B rainwater run-off
  • C soil erosion
  • D soil fertility

Question 8

Question
The diagram shows four positions on a river where water samples were taken. Which graph shows oxygen concentrations in the river?
Image:
Q8 (binary/octet-stream)
Answer

Question 9

Question
A large amount of herbicide is applied to a field. Heavy rainfall carries much of it into a nearby lake. What will be the effect of this on the lake?
Answer
  • A Herbicide decreases the growth of water plants.
  • B Herbicide decreases the number of bacteria.
  • C Herbicide increases the rate of evaporation from the lake.
  • D Herbicide kills the fish.

Question 10

Question
The table shows the amount of carbon dioxide in the atmosphere in three different years. What is the most likely cause of this change?
Image:
Q38 (binary/octet-stream)
Answer
  • A destruction of rainforests
  • B increased use of fertilisers containing nitrogen
  • C pollution of air by sulfur dioxide
  • D rise in the sea level

Question 11

Question
Which two gases both contribute to global warming?
Answer
  • A carbon dioxide and methane
  • B methane and oxygen
  • C oxygen and sulfur dioxide
  • D sulfur dioxide and carbon dioxide

Question 12

Question
Over-use of fertilisers on farmland causes the chemicals in the fertilisers to be washed into ponds and lakes. This causes eutrophication resulting in the following events. 1 algae grow 2 fish die 3 bacteria grow 4 oxygen decreases What is the correct sequence of these events?
Answer
  • A 1 → 3 → 4 → 2
  • B 1 → 4 → 3 → 2
  • C 3 → 4 → 2 → 1
  • D 4 → 1 → 2 → 3

Question 13

Question
The concentration of a pesticide in the tissues of the organisms in the following food chain was measured. Which bar on the chart represents the large fish?
Image:
Q13 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 14

Question
The diagram shows how sewage is treated. Why is air bubbled through the aeration tank?
Image:
Q1 (binary/octet-stream)
Answer
  • A to encourage microorganisms to reproduce quickly
  • B to float the sludge
  • C to settle the sludge
  • D to stop microorganisms from reproducing too quickly

Question 15

Question
 Three human activities are listed. 1 burning fossil fuels 2 deforestation 3 overusing fertilisers Which activities can cause the change shown in the graph?
Image:
Q2 (binary/octet-stream)
Answer
  • A 1, 2 and 3
  • B 1 and 2 only
  • C 1 only
  • D 2 and 3 only

Question 16

Question
What is a reason for conserving plant species?
Answer
  • A to absorb oxygen from the air
  • B to decrease rainfall
  • C to obtain drugs for medicinal use
  • D to release carbon dioxide into the air

Question 17

Question
What is reduced after deforestation?
Answer
  • A force of rain hitting the ground
  • B rainwater run-off
  • C soil erosion
  • D soil fertility

Question 18

Question
The diagram shows four positions on a river where water samples were taken. Which graph shows oxygen concentrations in the river?
Image:
Q19 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 19

Question
Which process may result in eutrophication in a lake?
Answer
  • A bleach entering from a factory
  • B fertilisers entering from farmland
  • C hot water entering from a power station
  • D pesticides entering from farmland

Question 20

Question
Which two gases are the biggest contributors to the greenhouse effect?
Answer
  • A carbon dioxide and methane
  • B carbon monoxide and carbon dioxide
  • C methane and sulfur dioxide
  • D sulfur dioxide and carbon monoxide

Question 21

Question
Untreated sewage is released into a river at point X. Which graph correctly shows changes in oxygen concentration of the water as the river flows away from X?
Image:
Q21 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 22

Question
What changes in combustion and deforestation increase carbon dioxide in the atmosphere?
Answer
  • A
  • B
  • C
  • D

Question 23

Question
What is the principal source of energy input into a biological system?
Answer
  • A consumer
  • B decomposer
  • C producer
  • D Sun

Question 24

Question
Some of the stages of eutrophication are listed. 1 death of organisms requiring dissolved oxygen in water 2 increased availability of nitrate and other ions 3 increased decomposition after death of producers 4 reduction in dissolved oxygen What is the correct order of these stages in eutrophication?
Answer
  • A 2 → 1 → 4 → 3
  • B 2 → 3 → 4 → 1
  • C 3 → 2 → 4 → 1
  • D 3 → 4 → 1 → 2

Question 25

Question
The list shows changes that occur in a lake which is polluted by nitrogen-containing fertiliser. 1 decomposers feed on plants 2 growth of algae increases on the lake’s surface 3 oxygen levels decrease in the lake 4 underwater plants die In which order do these changes occur?
Answer
  • A 2 → 4 → 1 → 3
  • B 2 → 3 → 4 → 1
  • C 3 → 4 → 2 → 1
  • D 3 → 4 → 1 → 2

Question 26

Question
The bloodworm is an organism that is found in heavily polluted water. The diagram shows where raw sewage flows into a river. Where would there be fewest bloodworms?
Image:
Q26 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 27

Question
What are the possible effects of deforestation?
Image:
Q27 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 28

Question
Large areas of tropical forests have been cleared to grow monocultures of palm oil plants. Which effect will this have on the ecosystem?
Answer
  • A The use of fossil fuels in the area will decrease.
  • B The use of pesticides in the area will decrease.
  • C The variety of species in the area will decrease.
  • D The variety of species in the area will increase.

Question 29

Question
What is not a reason for using chemical fertilisers in food production?
Answer
  • A improving growth rate
  • B improving mineral content of the soil
  • C increasing yields
  • D reducing competition with weeds

Question 30

Question
The diagram shows how sewage is treated. Why is air bubbled through the aeration tank?
Image:
Q30 (binary/octet-stream)
Answer
  • A to encourage microorganisms to reproduce quickly
  • B to float the sludge
  • C to settle the sludge
  • D to stop microorganisms from reproducing too quickly
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