Habitats & Ecosystems — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A camel has a hump that stores fat for long desert journeys.
A camel's hump holds fat the body uses for energy when food and water are scarce.
2. A fish breathes under water using gills on the sides of its head.
Gills filter oxygen out of water so fish can stay under the surface to breathe.
3. A bird uses its wings to fly up into the sky and reach high nests.
Wings let birds fly to escape danger, find food, and build nests in high places.
4. A polar bear's white fur helps it hide in the snow while hunting.
White fur blends with snow, letting polar bears sneak close to seals during hunts.
5. A duck has webbed feet that work like paddles in the water.
Webbed feet push water back like paddles, helping ducks swim quickly on ponds.
6. A cactus has sharp spines to keep hungry animals from eating it.
Cactus spines protect the plant by poking any animal that comes too close.
7. A frog has a long, sticky tongue to catch flies and bugs.
A frog's tongue snaps out fast and sticky so insects cannot escape.
8. Adaptations help animals survive in their own special habitat.
Each adaptation matches the habitat where the animal lives, making survival easier.
9. An Arctic fox has small ears that keep heat in during freezing days.
Small ears lose less heat than big ears, keeping Arctic foxes warm in the cold.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
camel
→ hump
hump
polar bear
→ thick fur
thick fur
fish
→ gills
gills
bird
→ wings
wings
Camels have humps for deserts, polar bears have fur for the Arctic, fish use gills in water, and birds have wings to fly.