
Understanding the Phosphorus Cycle

Interactive Video
•
Biology
•
6th - 8th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main topic discussed in the video?
The nitrogen cycle
The phosphorus cycle
The carbon cycle
The water cycle
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a role of phosphorus in living organisms?
Part of cell membranes
Component of DNA
Involved in photosynthesis
Helps maintain acid-base balance
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does the atmosphere not play a significant role in the phosphorus cycle?
Phosphorus is too light
Phosphorus is not found in rocks
Phosphorus compounds are not gases
Phosphorus is only found in water
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in the phosphorus cycle?
Absorption by plants
Decomposition
Weathering
Absorption by animals
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is phosphorus often a limiting factor for plant growth?
It is toxic to plants
It is usually present in small quantities
It is not needed by plants
It is abundant in the soil
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do animals obtain phosphorus?
By absorbing it from the air
By photosynthesis
By eating plants or plant-eating animals
By drinking water
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to phosphorus when plants and animals die?
It is decomposed and returned to the soil and water
It evaporates into the atmosphere
It disappears completely
It is absorbed by the sun
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