What adds CO2 to the atmosphere?
What removes CO2 to the atmosphere?
How does CO2 move through the cycle?
What happens to the carbon cycle if we kill all of the trees?
Select 2 from the options listed below:
How are nutrients recycled (returned) to the soil in the nitrogen cycle?
Why are decomposers (bacteria, fungi, and protists) important?
Who are the most important "character" parts of the nitrogen cycle?
The role of protists includes (select 2) -
Tremella fuciformis, more commonly known as snow fungus, grows on dead branches fallen from broad leaf trees.
Why is Tremella fuciformis important to the cycling of the chemical component carbon in the ecosystem?
Bacteria matter by breaking down or organic material.
Earth’s biosphere is a closed ecosystem that recycles organic materials such as carbon and nutrients in many forms of nitrogen.
San Francisco, a heavily populated city on the San Andreas fault in California. Due to an earthquake in 1989, over 12 thousand people were left homeless and many roads and vehicles were destroyed.
What impact did the earthquake of 1989 have on the carbon cycle within the biosphere?
Nitrogen provides nutrients to both plants and animals within the biosphere. 78% of nitrogen within the biosphere is in the form of nitrogen gas (N2).
Plants and animals use the N2 gas form for nutrients and require microorganisms such as to convert N2 gas into ammonia.
such as plants absorb the nutrients, then such as animals eat the plants for nutrients.
Which role of protists has the most positive effect on maintaining the plant population in an ecosystem?
Saprophytes are fungi that feed on dead and decomposing organisms. They secrete enzymes that digest components of cell walls, such as cellulose and lignin.
Which statement explains why these fungi are an important part of the biogeochemical cycle?
Which statement best describes how bacteria recycle matter in an ecosystem?
A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student's vegetable and paper scraps into rich fertilizer.
Which of the following best describes the role that these microorganisms play in natural habitats?
What would be the most likely effect of a wildfire that burned a large area of a forest?
Which statement is an example of how carbon moves through a food chain as part of the carbon cycle?
Students design an experiment to model the carbon cycle. The student combined the water and carbon dioxide-producing disks in a sealed flask. The flask represented Earth's atmosphere, and the lamp represented the sun. Their design is shown.
Which component can be added to the flask to reduce the concentration of carbon dioxide in the model atmosphere created by the disks?
When sawdust is added to soil, organisms in the soil will use all the available nitrogen to break the sawdust down.
What effect will the lack of nitrogen have on the plants that are near the sawdust?
The city of Houston has several major highways in the surrounding area. These highways have thousands of cars that burn gasoline every day. What is most likely the result of this on the carbon cycle?
The Sam Houston National Forest is being deforested for lumber and paper products. What step of the carbon cycle will be most directly affected by this human activity?
Nitrogen is an essential component of all living things. However, atmospheric nitrogen is unavailable for organisms to use. Through various processes and chemical changes, nitrogen moves through the biosphere, atmosphere, and geosphere in different forms, making it available for all organisms. Atmospheric nitrogen is deposited in the soil and surface waters primarily through precipitation. Once in the soil, microorganisms break down the nitrogen into different forms, which is then taken up by plants. Nitrogen eventually makes its way back into the atmosphere.
What would happen within the nitrogen cycle if a bactericide, a substance that kills bacteria, was added to the soil?
