Animal Groups — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which of these animals is an insect?
A) Frog
B) Ladybug
C) Goldfish
D) Cat
A ladybug is the insect because it has six legs and three body parts. Frogs are amphibians, goldfish are fish, and cats are mammals.
2. What do mammals use to feed their babies?
A) Seeds
B) Water
C) Milk
D) Leaves
Mammals feed their babies milk made by the mother's body. No other animal group does this.
3. Which animal is a reptile?
A) Parrot
B) Dolphin
C) Lizard
D) Bee
A lizard has dry, scaly skin and lays eggs on land, which makes it a reptile. Parrots are birds, dolphins are mammals, and bees are insects.
4. Where do amphibians lay their eggs?
A) In trees
B) In water
C) In sand
D) On rocks
Amphibians like frogs and salamanders lay their soft, jelly-like eggs in water so the eggs do not dry out. The babies hatch and swim before growing legs.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Insects have three body parts: head, thorax, and abdomen.
An insect's body is divided into three parts: the head, the thorax in the middle, and the abdomen at the back. That is why three is the answer.
2. Mammals are warm blooded, so they stay warm on their own.
Mammals are warm-blooded, meaning their bodies make their own heat and stay at the same temperature even when it is cold outside. Fur and hair help hold that warmth in.
3. A penguin is a bird even though it cannot fly.
A penguin has feathers, a beak, and lays eggs, so it is a bird even without flying. Not every bird needs to fly to belong to the bird group.
4. Turtles and tortoises are both reptiles.
Both turtles and tortoises have hard shells, scaly skin, and lay eggs on land, so they are reptiles. The main difference is that tortoises live on land while many turtles swim.
5. Butterflies start life as caterpillars before they change.
Butterflies begin life as caterpillars, which crawl and eat leaves before forming a chrysalis. Inside the chrysalis they change into a butterfly with wings.