Animal Groups — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Mammals have fur or hair.
Mammals are warm-blooded animals whose bodies are covered with fur or hair, which traps body heat and keeps them warm.
2. A goldfish is a fish.
Living in water, breathing through gills, and being covered with scales are the marks of a fish, and a goldfish has all of them.
3. Reptiles have dry scales.
Reptiles like snakes and turtles are covered with dry, hard scales that protect their skin and stop it from drying out.
4. An ant is an insect.
With six legs and three body parts, an ant has the main features that put an animal in the insect group.
5. A parrot is a bird.
Parrots have feathers, beaks, and wings to fly, three things that place them in the bird group.
6. Frogs can live on land and in water.
Frogs are amphibians, so they begin life swimming in water as tadpoles and grow up to hop on land too.
7. A whale is a mammal.
Even though a whale lives in the ocean, it breathes air and feeds milk to its calf, which makes it a mammal.
8. Butterflies are insects.
Six legs, three body parts, and a pair of antennae are the marks of an insect, and butterflies have all of them.
9. Birds lay eggs.
Instead of giving birth to live babies, birds build nests and lay eggs that hatch into chicks.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
bear
→ mammal
mammal
eagle
→ bird
bird
salmon
→ fish
fish
beetle
→ insect
insect
A bear has fur, an eagle has feathers, a salmon breathes with gills, and a beetle has six legs, so the matches are bear to mammal, eagle to bird, salmon to fish, and beetle to insect.