Animal Groups & Habitats — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A baby frog starts life as a tiny tadpole in the water.
Frogs begin life in water, where the egg hatches into a tiny tadpole that swims with a tail and breathes through gills before growing into an adult frog.
2. A caterpillar changes into a butterfly inside a chrysalis.
Inside the chrysalis, the caterpillar slowly changes through metamorphosis and emerges as a butterfly with wings.
3. Baby birds hatch from eggs that their mother keeps warm.
Mother birds lay eggs and sit on them to keep them warm, and the baby birds grow inside the shells until they are ready to hatch.
4. A baby cow is called a calf.
The word for a young cow is calf, the special name farmers use for a baby cow.
5. Mammals feed their babies milk from their bodies.
One thing that makes mammals special is that mother mammals make milk in their bodies to feed their young until the babies can eat on their own.
6. A baby dog is called a puppy.
A baby dog is called a puppy, and puppies are born tiny and helpless before they grow into full-sized dogs.
7. A tadpole grows legs before it can hop on land.
As a tadpole grows up, it slowly grows legs so it can leave the water and hop on land like an adult frog.
8. Most reptiles lay eggs on land that have tough shells.
Reptiles such as snakes and turtles lay eggs on land, and the tough leathery shells help protect the babies inside until they hatch.
9. A baby cat is called a kitten.
A young cat is called a kitten, and kittens stay close to their mother for warmth and milk when they are little.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each adult animal to the name for its baby.
Bear
→ Cub
Lamb
Hen
→ Chick
Foal
Horse
→ Foal
Chick
Sheep
→ Lamb
Cub
A baby bear is a cub, a baby hen is a chick, a baby horse is a foal, and a baby sheep is a lamb. Each adult animal has its own special name for its young.