What is the primary focus of understanding ecosystems at the elementary level?
LS2B - Cycles of Matter and Energy Transfer

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Science, Other, Social Studies, Biology, Life Skills
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11th Grade - University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The difference between organisms and their environment
The role of decomposers
The concept of ecological pyramids
The process of photosynthesis
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is matter recycled in ecosystems, as discussed in the video?
By the movement of energy in food webs
Through the process of photosynthesis
Through the consumption of producers by consumers
Via composting and the action of bacteria
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role do decomposers play in the matter cycle?
They prevent the flow of energy in ecosystems
They consume producers directly
They break down waste and return matter to the environment
They produce energy from sunlight
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which process allows plants to convert environmental materials into usable matter?
Nitrogen fixation
Cellular respiration
Decomposition
Photosynthesis
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the 10% rule in ecological pyramids?
It shows the total biomass in a coral reef
It indicates the amount of matter recycled by decomposers
It explains the energy loss at each trophic level
It describes the number of producers in an ecosystem
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a temperate grassland, what is the primary producer?
Insects
Grass
Mice
Hawks
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main source of energy for producers in an ecosystem?
Decomposed matter
The Sun
Carbon dioxide
Nitrogen
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