Animal Groups — Answer Key
Part A: Trace the Words
Trace each animal word by following the dotted lines.
1. reptile
2. bird
3. mammal
4. insect
Part B: Fill in the Blank
Write the missing word on the line.
1. Mammals have fur or hair on their bodies.
Mammals have fur or hair on their bodies to help keep them warm — this is one of the key traits of all mammals.
2. Birds have feathers to help them stay warm.
Birds have feathers that cover their bodies. Feathers help birds stay warm and, for most birds, help them fly.
3. Reptiles have dry scales on their skin.
Reptiles have dry scales on their skin. Scales protect the reptile's body and help prevent water loss.
4. An insect has six legs and three body parts.
An insect has six legs and three body parts: the head, thorax, and abdomen. Ants, bees, and beetles are all insects.
5. Fish use gills to breathe underwater.
Fish use gills to breathe underwater. Gills take in oxygen from the water the way our lungs take oxygen from the air.
Part C: True or False
Read each sentence. Circle True or False.
1. A cat is a mammal.
True False
True — A cat is a mammal because it has fur, gives birth to live kittens, and feeds its babies milk.
2. Reptiles have feathers.
True False
False — Reptiles do not have feathers. They have dry scales. Birds are the only animals that have feathers.
3. Birds lay eggs.
True False
True — All birds lay eggs. Even birds that cannot fly, like penguins and ostriches, lay eggs.