Cycles Test
Flashcard
•
Biology
•
9th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a food web?
Back
A food web is a complex network of feeding relationships among various organisms in an ecosystem, showing how energy and nutrients flow through different trophic levels.
2.
FLASHCARD QUESTION
Front
What role do producers play in an ecosystem?
Back
Producers, such as plants, convert sunlight into energy through photosynthesis, forming the base of the food chain and providing energy for consumers.
3.
FLASHCARD QUESTION
Front
What happens to a food web if a key species is removed?
Back
Removing a key species can disrupt the balance of the food web, leading to population increases or decreases in other species and potentially causing ecosystem collapse.
4.
FLASHCARD QUESTION
Front
Define the carbon cycle.
Back
The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms, involving processes like photosynthesis, respiration, and decomposition.
5.
FLASHCARD QUESTION
Front
What is the largest source of nitrogen in the biosphere?
Back
The atmosphere is the largest source of nitrogen in the biosphere, making up about 78% of the Earth's atmosphere.
6.
FLASHCARD QUESTION
Front
How do animals contribute to the carbon cycle?
Back
Animals contribute to the carbon cycle through respiration, which releases carbon dioxide back into the atmosphere, and through decomposition after death.
7.
FLASHCARD QUESTION
Front
What is the significance of decomposers in an ecosystem?
Back
Decomposers break down dead organic matter, recycling nutrients back into the soil and making them available for producers.
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