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This unit explains the diversity and evolution of living organisms and how these relate to survival in different environments.


The process by which the characteristics of a species change over many generations in response to the environment. A body part, body covering, or behavior that helps a plant or animal survive in its environment.


The coloring or patterns on an animal's body that allow it to blend in with its environment


An adaptation in which an otherwise harmless plant or animal looks like a harmful plant or animal in order to protect itself.


All the living and nonliving things that surround an organism (includes things such as water, air, soil, weather, landforms).


The location where an animal lives. The physical characteristics of an animal's surroundings where it can find everything it needs to survive.


An animal that hunts and eats other animals for food.


An animal that is hunted and eaten by another animal (predator).


Using adaptations to continue to live.


A group of different populations that live together and interact in an environment

life cycle

The stages living things go through as they grow and develop.


Any living thing.


All the living and nonliving things in an area that interact with each other.


All the organisms of one kind in an ecosystem.


All of the actions and reactions of a plant or animal.


Describes a species of plant or animal that once lived on Earth but which no longer exists.


An animal that eats both plants and other animals (meat).


An animal that eats only other animals.


An animal that eats only plants.


An organism that makes its own food (plants).

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