1. In cold climates, some animals .......... . This is when animals fall into a long, deep sleep during the cold, winter months. They usually find warm, dry places to sleep in for several months at a time. Bears and frogs do this in cold climates every year.

2. During the cold winter months, many animals .......... from colder areas to warmer regions. The often travel long distances so that they can find food easily and to protect themselves from harsh, winter conditions. Often, in the spring time, they travel back to their original locations. Some birds do this every year.

3. However, some animals grow thicker, winter coats of fur just before the winter months. This process is called .......... and this helps animals survive in harsh conditions.

4. In addition to thicker, winter coats, some animals .......... themselves by growing a different fur color. For example, the Arctic Fox grows a thick, white coat in the winter time in order to blend into its surroundings.

5. Animals that are hunted and killed by other animals are known as .......... .

6. Animals that hunt and kill other animals are called .......... .

7. .......... are animals that are warm-blooded, can grow hair or fur and produce milk for their babies.

8. Animals are classified in different ways. For example, some animals have backbones or spinal columns and they are called .......... .

9. Some animals don't have backbones or spinal columns and they are classified into the .......... category.

10. Another animal category is the .......... category. These are invertebrate animals, like bees or various other bugs, that have heads, lungs and stomachs but often also have wings.