When an animal species dies out forever the species is (a)   .

An (a)   animal species has very few left and is almost extinct.

A (a)   is where an animal lives in nature.

The (a)   is the physical world, including plants, animals, water, land, and air.

When a habitat is (a)   , it has the right amount of each animal- not too many or too few.

Humans and animals are (a)   . Our actions affect them and their actions affect us.

Putting up signs can help (a)   endangered species from danger.

An (a)   is all the living things in a specific place and how they interact with each other and their environment.

The (a)   is the source of heat and light for Earth.

A (a)   is a living thing that grows from the ground.

A (a)   is a tall plant with a trunk and branches.

____ is the gas that surrounds Earth. People breath in ____ for oxygen and then breathe out.

(a)  

To (a)   is to stay alive.

It is important to (a)   plants with water to survive.

A living thing, like a plant, (a)   s bigger during its lifetime.

(a)   is the top layer of Earth's surface, where plants grow.

Most plants have ____. The ____ usually grow down into the soil.

(a)  

Some plants are (a)   . They grow in many places.

Some plants are (a)   . They grow in only a few places and can be hard to find.

Some plants are (a)   . They are safe to eat.

Some plants are (a)   . They can make you sick.

Many plants have ____s. These plants are called ____ing plants.

(a)  

You can (a)   a plant by looking at its flowers and other parts.