Animal Groups & Habitats — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Read each animal name. Sort it into the correct group: mammal or reptile.
Mammal
dogcatwhale Reptile
lizardsnaketurtle Mammals have fur or hair and feed their babies milk. Reptiles are cold-blooded and covered in dry scales.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Mammals have fur or hair on their bodies.
Mammals have fur or hair on their bodies to help keep them warm.
2. Reptiles are covered in dry scales.
Reptiles are covered in dry scales that protect their bodies.
3. Mammals feed their babies milk.
Mammals feed their babies milk, which is one of the key traits of all mammals.
4. A reptile is a cold-blooded animal.
A reptile is a cold-blooded animal, meaning its body temperature changes with its surroundings.
5. Dogs and cats are both mammals.
Dogs and cats are both mammals because they have fur and feed their babies milk.
Part C: True or False?
Read each statement. Circle True or False.
1. Mammals have fur or hair.
True False
True — Mammals have fur or hair on their bodies, which helps keep them warm.
2. Fish breathe with lungs.
True False
False — Fish breathe with gills, not lungs. Gills allow them to take oxygen from the water.
3. Snakes are reptiles.
True False
True — Snakes are reptiles because they are cold-blooded and covered in dry scales.
4. Reptiles have feathers on their bodies.
True False
False — Reptiles have scales, not feathers. Birds are the animals that have feathers.