Animal Groups — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Penguins have wings but cannot fly.
Penguins have wings, but they use them for swimming in the ocean instead of flying.
2. A horse is a mammal because it has hair and feeds milk to its young.
A horse is a mammal because it has two key mammal features: hair on its body and milk for its babies.
3. Toads and newts are amphibians.
Toads and newts are amphibians because they can live on land and in water and have moist skin.
4. All fish live in water.
Fish must live in water because they breathe through gills, which only work underwater.
5. Spiders are NOT insects because they have eight legs.
Spiders have eight legs, but insects only have six. That extra pair of legs means spiders are not insects.
6. A parrot is a bird with colorful feathers.
A parrot is a bird because it has feathers, wings, and a beak. Its colorful feathers make it easy to spot.
7. Crocodiles lay their eggs on land.
Crocodiles are reptiles, and most reptiles lay their eggs on land where the sun helps keep them warm.
8. Dolphins breathe air even though they live in the ocean.
Dolphins are mammals, not fish. They come up to the surface to breathe air through a blowhole on top of their head.
9. Ladybugs and grasshoppers are types of insects.
Ladybugs and grasshoppers both have six legs and three body parts, so they are both insects.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
fish
→ breathe with gills
have fur and give milk
insects
→ have six legs
breathe with gills
birds
→ have feathers and beaks
have six legs
mammals
→ have fur and give milk
have feathers and beaks
Fish breathe with gills to get oxygen from water. Insects have six legs. Birds have feathers and beaks. Mammals have fur and give milk to their babies.