Carbon Cycle
Where is carbon located?
Earth’s crust, soil, air, ocean
What is one way that water can move from the atmosphere to the surface?
Precipitation
What is crucial for fixing the nitrogen-containing molecules that plants can use?
Bacteria
What are photosynthetic organisms in the bottom trophic level called?
Producers
What do plants do in the carbon cycle?
They absorb carbon dioxide and produce carbon-containing sugars
What is the exhalation of water vapor through the stomata?
Transpiration
Where do producers get their nitrogen-containing compounds?
The soil or water
In a food web, which direction do the arrows point? Towards the predator or towards the prey?
Prey
How do animals get carbon?
By eating plants or other animals
Where is 70% of all water on Earth stored?
Oceans
Nitrogen gas makes up what percent of the atmosphere?
78%
What are apex predators called?
Tertiary Consumers
What happens when rocks weather?
Carbon moves from the air to the ocean where it combines with calcium dissolved in water and forms limestone
What are four paths by which water can leave the surface and become unavailable to us?
evaporation, transpiration, respiration, ground surface evaporation
How do consumers obtain nitrogen-containing compounds?
Food
What percentage of energy in one trophic level is available for organisms in the next level?
10%
How does human activity affect the carbon cycle?
When we burn fossil fuels which leads to an increase in greenhouse gases in the atmosphere
Long-term/prolonged changes to the amount of water available in an ecosystem will lead to changes in what?
It may cause certain plants or animals to die
How does the lack of nitrogen affect ecosystems?
It limits the growth of plants
What is a group of organisms in a community that occupies the same position in the food web called?
Trophic Level