Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
What is the process by which fertilisers get into waterways?
Leaching
Absorption
Succession
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1In the process of eutrophication, leaching of mineral ions into lakes from fertilised fields can cause the rapid growth of .
2This blocks light from reaching plants growing below the surface, and prevents them from performing .
3This causes the plants to die, and the bacteria that feed on the dead plant matter are called bacteria.
4As these bacteria increase in numbers, they use up the in the water through aerobic respiration.
5Low levels of can kill the fish and other aerobic organisms in the lake.
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In biology, what is the cause of eutrophication?
Excess oxygen in waterways
Excess nutrients in waterways
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During the process of eutrophication, what causes the algae in waterways to grow rapidly?
High levels of nutrients such as nitrates
Dead matter from dead plants and fish
Rapidly growing aquatic plants below the water's surface
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What is leaching?
Dissolved ions flowing through the soil into bodies of water
Anaerobic respiration by bacteria
Population growth of algae
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What is the order of events in eutrophication?
- Sunlight is blocked so plants start to die
- Bacteria digest the dead plants, using up the oxygen
- Excess nutrients get washed into rivers and lakes
- Animals in the water die due to lack of oxygen
- Algae grow and reproduce more quickly
3 ➔ 2 ➔ 1 ➔ 5 ➔ 4
1 ➔ 2 ➔ 3 ➔ 4 ➔ 5
5 ➔ 3 ➔ 2 ➔ 1 ➔ 4
3 ➔ 5 ➔ 1 ➔ 2 ➔ 4
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Why do we use fertilisers in agriculture?
To replace the nutrients lost through crop and livestock harvesting
To feed livestock
To kill crop pests
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A new golf course is built next to a river. Over the past several months, the nitrate levels of the water in the river have been increasing. Which of the following is a likely cause of the increasing nitrate levels?
Decreased biodiversity
Fertiliser runoff from the golf course
Increased growth of bacteria
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Which of the following can reduce eutrophication?
Using larger quantities of fertiliser when growing crops
Irrigating the fields more so the soil becomes waterlogged
Controlling the use of fertiliser and storing manure and slurry more securely
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