WorksheetsNutrient Cycles Of The Earth
Total questions: 17
Worksheet time: 26mins
Which role does photosynthesis play in the carbon cycle?
It absorbs carbon from the soil
It releases carbon into the soil
It removes carbon dioxide from the atmosphere
It adds carbon dioxide to the atmosphere
Which word describes the burning of fossil fuels?
Consumption
Combustion
Conduction
Conservation
Carbon has an important role in all living organisms on Earth. Which statement best describes this role?
It makes up 70% of our cells
It is a unique component of DNA and RNA
It forms the backbone of the major macromolecules / biological molecules
It controls the cell's activities
Carbon dioxide can be removed from the Earth's atmosphere. Which of these describes one way in which it is removed?
Carbon dioxide can dissolve into seawater
Carbon dioxide can be evaporated by sunlight
Carbon dioxide can be trapped in sedimentary rocks
Carbon dioxide can be used by animals and plants for cellular respiration
6. Water can also move through the soil layer. What is the name of this process? Give your answer as a single word with no period at the end.
(a)
7. When the soil layer is saturated, water can no longer be absorbed by it and move through it. Instead, it moves along the surface of the ground. We call water that moves here "surface (a) ". What is the missing word? Give your answer as a single word with no period at the end.
Assimilation
Ammonification
Nitrogen fixation
Denitrification
9. Label B is for a group of organisms that help to recycle nitrogen compounds from dead organisms. What is the name for this group of organisms? Give your answer as a single word with no period at the end.
(a)
10. Label C is a name for the useful form of nitrogen that plants can take up and use. What is the name of this? Give your answer as a single word with no period at the end.
(a)
TRUE or FALSE: Phosphates can dissolve in water.
True
False
Which geological process moves rocks from the seabed onto land over many many years? Give your answer as a single word with no period at the end.
(a)
Addition of what to crops and fields can cause excess nutrients to accumulate in waterways?
Fences
Weedkiller
Pesticides
Fertilizer
What can occur as a result of excessive nutrients? Select all that apply.
Algal blooms
Increase in fish populations
Increase in bacterial decomposers populations
Increase in oxygen levels in the water
True or False: The Earth's atmosphere helps the phosphorus cycle.
True
False
What type of plants help the nitrogen cycle the most?
Trees
Flowers
Bushes
Legumes (like beans)
