Science Unit 3 Vocabulary

1. ___occurs when one living thing looks like another.

1. An/A ___ includes all the living and nonliving things that interact in an environment.

1. A/ An ___ is an organism that is introduced into a new ecosystem either by accident or on purpose by humans.

1. Animals ___ or go in a deep sleep to survive the winter when there can be less food to eat.

___ is the struggle among living things for resources.

__ is a structure or behavior that helps an organism survive.

Animals need ___, which is a gas.

Animals __ to survive. They move to find food or reproduce.

___ is when there is no more of an organism’s kind left on Earth.