Animal Groups — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A lizard is a reptile.
Dry, scaly skin and cold-blooded bodies are the marks of a reptile, and a lizard has both.
2. Mammals are warm blooded.
Mammals make their own body heat and stay the same warm temperature inside, so they are called warm blooded.
3. Fish have fins to help them swim.
Fins push against the water and steer the body, so fish use fins to help them swim.
4. A bee is an insect.
A bee has six legs, wings, and three body parts, the main features of an insect.
5. Penguins are birds that cannot fly.
Even though they cannot fly, penguins still have feathers, wings, and beaks, which puts them in the bird group.
6. A horse is a mammal.
A horse has hair, feeds milk to its foal, and is warm blooded, three things that make it a mammal.
7. Snakes do not have legs.
Snakes slide along the ground using their long bodies because they do not have legs to walk on.
8. Tadpoles grow into frogs.
Tadpoles live in water and slowly grow legs and lungs as they change into frogs.
9. Spiders have eight legs.
Counting a spider's legs gives eight, two more than an insect's six, which is one way to tell them apart.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
shark
→ fish
fish
robin
→ bird
bird
ladybug
→ insect
insect
rabbit
→ mammal
mammal
A shark breathes with gills, a robin has feathers, a ladybug has six legs, and a rabbit has fur and feeds milk, so the matches are shark to fish, robin to bird, ladybug to insect, and rabbit to mammal.