Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 18 Vocab

Ecology The study of the interactions of living organisms with one another and with their environment.
Biotic Describes living factors in the environment.
Abiotic Describes the nonliving part of the environment, including water, rocks, light, and temperature.
Population A group of organisms of the same species that lie in a specific geographical area.
Community All the populations of species that live in the same habitat and interact with each other.
Ecosystem A community of organisms and their abiotic environment.
Biosphere The part of Earth where life exists.
Herbivore An organism that eats only plants.
Carnivore An organism that eats animals.
Omnivore An organism that eats both plants and animals.
Food Chain The pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms.
Food Web A diagram that shows the feeding relationships between organisms in an ecosystem.
Energy Pyramid A triangular diagram that shows an ecosystem´s loss of energy, which results as energy passes through the ecosystem´s food chain.
Photosynthesis The process in which an organism uses sunlight to make food.
Decomposers Organisms that get energy by breaking down dead organisms.
Scavengers Omnivores that eat dead plants and animals.
Consumers Organisms that eat other organisms.
Producers Organisms that use sunlight directly to make food.
Carrying Capacity The largest population that an environment can support at any give time.
Prey An organism that is killed and eaten by another organism.
Predator An organism that eats all or part of another organism.
Symbiosis A relationship in which two different organisms live in close association with each other.
Mutualism A relationship between two species in which both species benefit.
Commensalism A relationship between two organisms in which one organism benefits and the other is unaffected.
Parasitism A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed.
Coevolution The evolution of two species that is due to mutual influence, often in a way that makes the relationship ore beneficial to both species.
Limiting Factor A resource that is so scarce that it limits the size of a population.
Competition When two or more individuals or populations try to use the same resource, such as food, water shelter, space, or sunlight.
Camouflage Blending in with the background.
Pollinator An organism that carries pollen from one flower to another.
Created by: KoboC