Cycling
Presentation
•
Science
•
1st Grade
•
Practice Problem
•
Hard
Wayground Resources
FREE Resource
13 Slides • 15 Questions
1
2
3
Multiple Choice
Which of the following organisms is responsible for breaking down organic material and returning nutrients to the environment?
Autotrophs
Saprotrophs
Herbivores
Carnivores
4
Open Ended
Why is nutrient cycling important for the survival of ecosystems?
5
6
Multiple Choice
Which of the following best describes the process by which biomass accumulates in an ecosystem?
Autotrophs and heterotrophs grow or reproduce, increasing biomass
Cell respiration converts carbon compounds to CO2 and water, increasing biomass
Biomes with less sunlight accumulate biomass faster
Productivity is only described in terms of secondary production
7
8
Open Ended
Explain the difference between gross primary production and net primary production, and why net primary production is always less than gross primary production.
9
10
Multiple Select
Which of the following statements about secondary production is/are correct?
It represents the generation of biomass by heterotrophs and saprotrophs
It forms from a transfer of mass through feeding
Net secondary production accounts for biomass lost to respiration and excretion
It is always higher than net primary production
11
12
Fill in the Blanks
The carbon cycle demonstrates the exchange of carbon between sources and
Type answer...
13
14
Multiple Choice
Based on the carbon cycle diagram, which process is responsible for transferring carbon from plants to animals?
Feeding
Respiration
Photosynthesis
Combustion
15
16
Open Ended
Describe how photosynthesis and cellular respiration contribute to carbon fluxes within ecosystems, using the diagram as a reference.
17
18
Multiple Choice
Which process leads to a decrease in atmospheric CO2 levels according to the diagram and explanation?
Photosynthesis
Cell respiration
Combustion
Decomposition
19
20
Open Ended
Explain how the formation of fossil fuels is influenced by the presence or absence of oxygen in the environment.
21
22
Multiple Select
Which of the following are products of the combustion of fossil fuels?
Carbon dioxide
Water
Oxygen
Energy
23
24
Fill in the Blanks
The Keeling curve shows an overall increase in atmospheric
Type answer...
25
26
Open Ended
How do carbon fluxes connect the processes of photosynthesis, extinction, ecosystem sustainability, and climate change?
27
Multiple Choice
Which of the following statements best describes the process of nutrient cycling in ecosystems?
Nutrients are used once by organisms and then lost from the ecosystem.
Nutrients are constantly recycled by organisms within the ecosystem.
Only autotrophs recycle nutrients in the ecosystem.
Nutrients are only obtained from the soil and not returned.
28
Open Ended
Explain the role of saprotrophs in the nutrient cycle within ecosystems.
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