Question 1

State one reason why microplastics are considered long-lasting pollutants.

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Question 2

State one reason why microplastics can enter food webs at low trophic levels.

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Question 3

Define the term habitat fragmentation.

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Question 4

State one way in which deforestation can reduce matter storage in an ecosystem.

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Question 5

Define the term invasive species.

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Question 6

State one example of a natural resource that can be overexploited.

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Question 7

State one reason why human impacts on ecosystems are often described as rapid.

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Question 8

State one edge effect that can occur after habitat fragmentation.

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Question 9

Define the term overexploitation.

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Question 10

A food chain is phytoplankton → zooplankton → sardine → tuna → shark. Suggest which organism is likely to have the highest concentration of mercury.

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Question 11

State the two broad types of pollution.

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Question 12

Define the term pollution.

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Question 13

Define the term microplastics.

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Question 14

Define the term overexploitation.

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Question 15

State one pathway by which invasive species can be introduced to a new ecosystem.

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Question 16

Distinguish between a non-native species and an invasive species.

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Question 17

Suggest two possible impacts of plastic pollution on marine organisms.

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Question 18

What is habitat fragmentation?

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Question 19

Suggest one source of mercury pollution in marine ecosystems.

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Question 20

Distinguish between reduced primary productivity and reduced biomass in an ecosystem.

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Topic 2.6: Human Impacts Questions

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