Habitats & Ecosystems — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A bear sleeps all winter long. This is called hibernation.
Hibernation lets bears save energy when food is hard to find in winter.
2. Geese fly south in the fall to find warm weather. This is called migration.
Migration helps birds find food and warmth when winter makes their home too cold.
3. A green grasshopper is hard to see in the grass because of its camouflage.
Camouflage hides animals from predators by helping them match their surroundings.
4. A chipmunk stores nuts in the fall to eat during winter.
Chipmunks save food in fall so they still have something to eat when winter comes.
5. An owl hunts at night when mice come out of hiding.
Owls have big eyes and quiet wings that make them great at hunting in the dark.
6. A rabbit runs very fast to escape a fox.
Rabbits cannot fight big animals, so running fast is their best way to stay safe.
7. A duck has waterproof feathers so it stays dry while swimming.
Duck feathers have oil that keeps water from soaking in, so the duck stays warm and floats.
8. A turtle pulls its head into its shell when it feels scared.
A turtle's shell is like built-in armor that protects it from animals that want to eat it.
9. Bees work together in a hive to make honey.
Bees share jobs in a hive so the whole group can collect nectar and raise young bees.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Hibernating all winter
→ Saves energy when food is scarce
Saves energy when food is scarce
Flying south in fall
→ Finds a warmer place to live
Finds a warmer place to live
Matching leaf colors
→ Hides from hungry predators
Hides from hungry predators
Storing nuts in fall
→ Keeps food for cold months
Keeps food for cold months
Every animal behavior helps with a need, like staying safe, finding food, or keeping warm.