All the living things surrounding an organism are called _______________.

Plants need _____ to make food.

All living things are called _________.

A change in a characteristic of a living thing that allows it to survive in its environment is called _____________.

Anything that can meet a need of a living thing is _____________.

Some animals _______ from one ecosystem to another to find food and water.

During the coldest months of the year, some animals _________.

The living and nonliving things in an area are called _____________.

Anything that makes the air, land, or water dirty is called _________.

The changes that living things make in their ecosystem can be __________________.