Carbon Cycle
Where is carbon on the periodic table?
It is the sixth element on the periodic table.
True or false. Without oxygen, lifeon Earth would not be possible.
True, all life on earth relies on some form of oxygen. Through respiration, photosynthesis and the formation of earth, oxygen was present in all of these events, even in the fire in twin towers had oxygen present in it. There was oxygen in the fire, it was one source of fuel.
How much nitrogen takes up earths air?
Nitrogen gas takes up approximately 75% of earth's dry air.
Do positives create more or less in a system?
they create more to balance out the system.
If I set a timer for 3 minutes and the timer goes off is that a positive or negative feedback?
Negative, this is because the timer has reached its desired output and is now at equilibrium.
Name one way sea creatures use carbon.
They use the carbonate ions to build their shells
What is the driving force for making oxygen available for life?
Photosynthesis, living organisms take in oxygen gas and convert it to carbon dioxide during respiration. The carbon dioxide is returned to the air. Photosynthesis reverses this process and in the process of making carbohydrates, takes in carbon dioxide, converts it to oxygen, then releases the oxygen into the air.
Why are nitrates used in fertilizers?
Nitrates provide plants with an accessible source of nitrogen. It is faster to give plants nitrates directly than to wait for bacteria to convert nitrogen to ammonia, ammonia to nitrites, and nitrites to nitrates.
What are the two types of feedback?
Positive and negative, like feedback on a video. if someone receives positive feedback its telling them that they should continue, and if it has negative feedback its telling them they should stop.
What is an output?
An output is the end product of a system, whether its positive or negative feedback, they're both play an important role in systems.
What are the four main reservoirs?
Atmosphere, the air. The biosphere, the plants and animals. The lithosphere, the earth. And the hydrosphere the water.
What are the main differences between oxygen and ozone in terms of structure and use for living things?
Living organisms use oxygen to break down food. Ozone is a molecule made of three oxygen atoms unlike Oxygen, that is made of two oxygen atoms. It forms a layer in the Earth's atmosphere where it absorbs the majority of the harmful UV radiation from the Sun, protecting the living things on Earth and allowing them to live on the surface.
Where is nitrogen on the periodic table?
Nitrogen is the 7th element on the periodic table.
in the case of chernobyl, when the reactor overheated was this an example of positive feedback or negative feedback?
Its positive, this is because the output was the overheating and the reactor kept overheating till it blew up.
when negative feedback is produced, is the system still creating outputs?
No, it has reached equilibrium.
What are the two sources of energy for the carbon cycle?
The two sources of energy for the carbon cycle are the Sun and the Earth's own internal energy.
What are hypoxic areas, also known as "dead zones", in oceans and lakes?
The term, hypoxic, means low oxygen levels. These areas happen in oceans and lakes, where nutrient pollution and other factors deplete the oxygen required to support marine life. And because life can no longer be supported in these areas, they are known as "dead zones".
What is the nitrogen cycle?
Nitrogen Fixation, for nitrogen gas to become useful to living things, it must first be converted into ammonia. Bacteria that live in the soil or in the roots of specific plants known as legumes have the ability to turn nitrogen into ammonia. Nitrification, bacteria convert the ammonia in the soil to nitrates, another form of nitrogen that plants can absorb. This process involves first changing the ammonia to nitrites, then converting nitrites to nitrates. Ammonification, when living things die, the nitrogen in their decaying organic matter is converted back to ammonia by bacteria. This returns nitrogen back to the soil where it can again be absorbed by more plants. Denitrification, a bacteria converting the ammonia and nitrates in soil, back to atmospheric nitrogen. This nitrogen returns to the air.
If I take my cat to the vet to get declawed and they keep meowing constantly, is this a positive or negative feedback?
This is a positive feedback because they are trying to get into a calm state, so they keep meowing to say that this is causing the equilibrium of their feelings to be off.
in a system if a system has reached equilibrium, will it continue to create outputs?
a system that has reached its equilibrium will not produce any more outputs ans has reached its state of harmony.
Would life on earth be possible without carbon?
No it would not, carbon makes up our rocks out trees and helps plants produce oxygen. if carbon was not present than there would be many issues with plants, the earth and the water, along with the air.
Where is oxygen on the periodic table?
It is the eighth element on the periodic table.
What is the affect the Haber-Bosch process can have on lakes and rivers?
It can lead to an access of ammonia in lakes in rivers feeding the algae, causing algae blooms in the water. These algae blooms can lead to less oxygen in the water, killing the animals and the plants. This can lead to blue green algae that can harm most animals and humans.
if a system gives out positive feedback, has it reached equilibrium?
A system that has not reached equilibrium will continue to create more outputs.
if i set my thermostat to 68 and it turns off when it reaches 68 is that an example of positive or negative feedback.
That is an example of a negative feedback, the system has reached equilibrium and is not going over 68.