Cycles

Question 1 of 10

In the water cycle, water vapour cools to form clouds by

Question 2 of 10

The stage of a housefly's life cycle that feeds on rotting material is the

Question 3 of 10

In the nitrogen cycle, the conversion of ammonium compounds to nitrates is

Question 4 of 10

The process by which plants make food using sunlight is

Question 5 of 10

Decomposers return nutrients to the soil by

Question 6 of 10

The stages in the life cycle of a mosquito are

Question 7 of 10

Bacteria in the root nodules of legumes convert atmospheric nitrogen into compounds plants can use. This is

Question 8 of 10

In the carbon cycle, fossil fuels are formed from

Question 9 of 10

Lightning contributes to the nitrogen cycle by

Question 10 of 10

Which process removes carbon dioxide from the atmosphere?