The cycle that includes photosynthesis and cellular respiration.

Energy pyramids are often used to show energy flow in an ecosystem. These organisms make up the BOTTOM part of the pyramid, are the most abundant, and have 100% of the sun's energy.

This is when an ecosystem has the maximum number of organisms it can support.

When an ecosystem rebuilds after a natural disaster, like a volcanic eruption, fire, flood, or tornado

These species are non-native, destructive to the ecosystem, and have no natural predators.

Photosynthesis removes this from the air

This much energy is passed on from each trophic level.

This kind of growth is when a population grows without limits.

This happens to biodiversity when invasive species are introduced into an ecosystem.

Global warming is caused when too many greenhouse gases are in the atmosphere. Humans contribute to global warming by releasing these two gases into the atmosphere through burning fossil fuels and industrial farming.

This cycle does not involve the atmosphere. This cycle involves rocks being broken down to add phosphates back into the soil.

In this food chain, this organism is at the THIRD trophic level.
Grass-> grasshopper -> sparrow -> snake

This kind of relationship is where one population controls the other's size through feeding. Examples would be wolves and moose, gazelles and lions, alligators and birds

This type succession occurs when only bare rocks are present.

When a species loses the place where it lives this is called....

In this cycle, BACTERIA are the stars. They help take this element from the air, fix it into the soil, so that plants can get the nitrates from the soil.

Tertiary consumers are carnivores. They are also sometimes called...

These are species that are native, usually predators, and are very important to the ecosystem. Without them, the ecosystem could not exist.

After a forest fire, this type of succession will occur.

This is one way humans can decrease their impact on the environment

If deforestation continues at alarming rates, the first impact is this GAS building up in the atmosphere and contributing to global warming.

If producers in a food chain have 50,000 kcal of energy, this much energy will be passed on to the tertiary consumer in the food chain.

After a population reaches carrying capacity, this happens to the population size.

If keystone species are present and healthy in an ecosystem, this will happen to the biodiversity.

When fertilizers runoff into ponds, it increases the amount of nitrogen in the water. This can cause algae blooms that use up all of the oxygen in the water, this is one solution to the problem.