
Decomposers
Presentation
•
Biology
•
6th - 8th Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Brittany Burris
Used 69+ times
FREE Resource
4 Slides • 10 Questions
1
Any organism that breaks down dead and decaying organisms.
The most common decomposers in an ecosystem are fungi and bacteria.
Decomposers
2
There are microscopic bacteria and fungi found on almost everything.
The bacteria and fungi is responsible for breaking down biomass.
This is what causes food to rot.
3
Decomposers recycle nutrients from the dead and decaying organisms back into the environment for other living organisms to use.
Carbon and nitrogen are two of the elements recycled.
4
Open Ended
What would happen if all the decomposers disappeared from Earth?
5
Multiple Choice
If decomposers are removed from Earth, would food still rot?
yes
no
6
Multiple Choice
The main role of decomposers is to...
alter the atmosphere
eat living organisms
help biomass decay
7
Multiple Choice
Which of the following is not a role of decomposers?
breaking down biomass
recycling nutrients
releasing carbon and nitrogen back into the ecosystem
helping producers with photosynthesis
8
Multiple Choice
If decomposers only eat dead organisms, do they compete with consumers for food?
yes
no
9
Multiple Choice
Which of the following would happen if decomposers disappeared?
consumers would have more food
nutrients would never recycle
biomass would decay faster
producers would have more sunlight
10
As you move up the energy pyramid, the number of organisms and amount of energy found in each trophic level gets smaller.
The 10% Rule and Trophic Levels
11
Multiple Choice
Which trophic level contains the most energy?
producers
primary consumers
secondary consumers
tertiary consumers
12
Multiple Choice
Which trophic level contains the least energy?
producers
primary consumers
secondary consumers
tertiary consumers
13
Multiple Choice
Based on this food chain, what could happen to the population of owls if most beetles disappeared?
It would stay the same since they don't eat beetles
Fewer owls because there would be more plants
Fewer owls because there will be less mice to eat
There is no way to predict this
14
Multiple Choice
Based on this food chain, what is necessary for it to be sustainable?
Many owls to keep mice populations low
Many plants and few owls
Equal numbers of each
More beetles than plants
Any organism that breaks down dead and decaying organisms.
The most common decomposers in an ecosystem are fungi and bacteria.
Decomposers
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