A white bear that lives in extremely cold climates.

Trees release this, and it is important to living things

An organ that beats.

The tallest animal in the world

Plants need nutrients, water, and ______ to grow.

Sight, smell, hearing, touch, and taste.

The fastest animal in the world, averaging at a top speed of 75 m.p.h.

The process of organisms breaking down into simpler organic matter.

Our bodies contain 70% of this.

Whales and dolphins use this to breathe air when surfacing the water.

Humans lose the most heat from what part of the body?

White Fang was half dog. He was also half ____ as well.