4th grade animals and habitats

Question 1

Many deep-sea fish live in total darkness. Which sense would be least useful there?

• A. touch
• B. sensing movement in the water
• C. smell
• D. sight in normal daylight colours

Question 2

What does this internal structure do: brain?

• A. pumps blood around the body
• B. take in oxygen from water
• C. controls the body and processes information
• D. supports and protects the body

Question 3

Is this an internal or an external structure: an eagle's talons?

• A. external (outside the body)
• B. internal (inside the body)

Question 4

What makes a good question in a classification key?

• A. It asks which animal you like best.
• B. It has a clear yes or no answer you can observe.
• C. It has many possible answers.
• D. It asks whether the animal is cute.

Question 5

A crab sheds its shell as it grows. Why?

• A. It is too hot inside.
• B. Its shell is made of skin.
• C. To change colour.
• D. The hard external shell cannot stretch, so it must be replaced by a bigger one.

Question 6

Which special sense does this animal use: butterfly?

• A. tastes with its feet
• B. echolocation: hears echoes of its own squeaks
• C. senses tiny electric signals from muscles of hidden fish
• D. heat-sensing pits that "see" warm prey

Question 7

True or false? All animals have exactly the same five senses as humans.

• A. True
• B. False

Question 8

Key: 1. Has feathers? Yes → go to 2. No → go to 3. 2. Can fly? Yes → robin. No → penguin. 3. Has fur? Yes → rabbit. No → frog. An animal has feathers but cannot fly. What is it?

• A. robin
• B. rabbit
• C. frog
• D. penguin

Question 9

Is a worm a vertebrate or an invertebrate?

• A. vertebrate
• B. invertebrate

Question 10

Which invertebrate group does a tick belong to?

• A. insect
• B. arachnid
• C. mollusc (mollusk)
• D. crustacean

Question 11

Scientists sort living things into large groups. Which is a kingdom of living things?

• A. rocks
• B. fungi
• C. liquids
• D. metals

Question 12

Which group has the most species on Earth?

• A. invertebrates
• B. mammals
• C. birds
• D. reptiles

Question 13

Owls hunt mice at night in the dark. Which sense helps them most?

• A. seeing ultraviolet
• B. excellent hearing that pinpoints rustling sounds
• C. taste
• D. a sense of electricity

Question 14

What does this internal structure do: skeleton?

• A. take in oxygen from the air
• B. breaks down food
• C. supports and protects the body
• D. pumps blood around the body

Question 15

Is this an internal or an external structure: the lungs?

• A. external (outside the body)
• B. internal (inside the body)

Question 16

What makes a good question in a classification key?

• A. It has many possible answers.
• B. It asks which animal you like best.
• C. It has a clear yes or no answer you can observe.
• D. It asks whether the animal is cute.