Grade 4 structure and function

• digestion

• digestion

• hearing

• protection

The skull and the rib cage are both made up of bones. What function do the skull and the rib cage share?

• 1. allowing the movement of the body

• 1. blood providing the body with water

• 1. helping the body digest food

• 1. protecting the organs of the body

Jordan reached toward a hot stove. Her hand sensed the heat. This caused her to pull her hand back. Which part of the body sensed that the stove was hot?

• nerves

• bones

• muscles

• blood

Wild cats are able to escape from predators by climbing trees. Which part of a cat helps it climb?

• tail

• whiskers

• claws
  

• fur

Male peacocks have a train of tail feathers that is bright and beautiful in color.

What is the function of the male peacock's train?

• 1. It attracts females.

• 1. It is used to help the peacock swim in water.

• 1. It scares away predators.

• 1. It attracts small animals for the peacock to feed on.

What structure do turtles have that provides protection against predators?

• 1. a hard shell

• 1. sharp teeth

• 1. poisonous venom

• 1. sharp claws

Owls hunt at night. What feature of the owl is most helpful for hunting in the dark?

• 1. a beak

• 1. feathers

• 1. sharp claws

• 1. large eyes

A rat gains energy by eating grass. Which of the rat’s organs digests the grass?

• 1. brain

• 1. stomach

• 1. heart

• 1. lungs

Whales live underwater, but they have to come to the surface to breathe air. They have different ways to stay in control of their breathing. One way that they do this is by never falling completely asleep because they must go to the surface to get air. Which of these structures would help a whale know when it needs to come up to the surface to breathe?

• heart
  

• brain
  

• ear
  

• stomach

How does a hummingbird's beak help it to meet its basic needs?

• 1. The beak allows the bird to swim fast.

• 1. The beak scares away predators.

• 1. The beak allows the bird to eat the nectar out of flowers.

• 1. The beak helps the bird to fly.