An area and all of the living and nonliving things that inhabit that area is known as this.
What is an ecosystem?
The ecological relationship shown here:

What is competition?
These types of organisms are at the bottom of the energy pyramid.
What are producers?
OR
What are autotrophs?
How do animals get the nitrogen they need to build DNA and proteins?
What is feeding?
OR
What is eating? What is through the food chain?
Burmese Pythons were brought to the Everglades as exotic pets. They are now apex predators with no natural enemies, causing severe ecological damage.
What are invasive species?
These organisms recycle matter in ecosystems.
What are decomposers?
Type of relationship shown.

What is prey/predator?
The secondary consumer in this food chain.
What is the chameleon?
This process fixes carbon dioxide gas into a form that can be used by living things.

What is photosynthesis?
The removal beavers from ecosystems causes drastic, chaotic changes to the ecosystem. Beavers are this type of species.
What is keystone species?
Climate, type of terrain, and amount of water are all this type of nonliving factor in an ecosystem.
What are abiotic factors?
Symbiotic relationship where one organism lives on or inside another organism and causes it harm.
What is parasitism?
In the food web below, these are the direct food sources for the snake.

What are the shrew and the frog?
These unicellular organisms live in the soil and fix nitrogen into a form that can be used by plants.
What are bacteria?
What is biodiversity?
A herd of cows, flock of birds, or school of fish, are all examples of this level in an ecosystem.
What is a population?
The red-billed oxpeckers feed from lesions full of ticks or other parasites on a rhino’s hide and may warn rhinos of nearby poachers.

What is mutualism?
This is what happens to most of the energy that is "lost" to ecosystems.
What is it is lost as heat?
OR
What is it is used in metabolism?
This human activity releases excess carbon dioxide into the atmosphere.

What is combustion? OR
What is burning fossil fuels?
Due to biomagnification, this organism has the highest levels of mercury.

What is the killer whale?
All of the living things in a given area.
What is a community?
Remora fish use a specialized suction organ to hitch rides on sharks, saving energy while eating food scraps from the host. The shark is unaffected.

What is commensalism?
The amount of energy available to producers if there are 52 kJ available to secondary consumers.
What is 5,200 kJ of energy?
This happens when excess nitrogen from fertilizer enters aquatic ecosystems.

What is eutrophication?
OR
What are algal blooms?
This natural process releases carbon dioxide gas back into the atmosphere. Hint: It is the "opposite" of photosynthesis.
What is cellular respiration?
