A hawk lands on a branch holding a small dead animal. It uses its sharp hooked beak on the food before swallowing. How does this external structure help the hawk survive?

A great blue heron has very long, thin legs. It hunts fish and frogs at the edge of a pond. How do its long legs help this bird get food?

A duck's feet have wide flaps of skin stretched between the toes. The duck spreads these feet as it swims across a lake. How does this structure help the duck?

An arctic hare grows a coat of white fur before winter arrives. Snow covers the ground all around it. How does this white coloring help the hare survive the winter?

An owl drops onto a mouse and closes its sharp, curved claws around it. The owl then carries the mouse to a branch. How do the owl's claws help it survive?

A box turtle's back is covered by a hard, dome-shaped shell. When a fox comes near, the turtle pulls its head and legs inside. How does the shell help the turtle survive?

Inside a rabbit's chest, curved bones form a cage around the heart and lungs. How does this internal structure help the rabbit survive?

Water flows into a fish's mouth and out past its gills as the fish swims. How do gills help the fish survive underwater?

A hummingbird has a very long, thin beak. It feeds on the sweet liquid that sits deep inside tube-shaped flowers. How does the shape of its beak help it survive?

A porcupine's back is covered with stiff, sharp quills. When a coyote comes close, the porcupine raises the quills and turns its back to the coyote. How do the quills help it?

A polar bear swims in icy ocean water. Under its skin is a thick layer of fat. How does this internal structure help the polar bear survive in the Arctic?

A young white-tailed deer has light spots on its brown coat. The spots help it blend in with the patchy sunlight and leaves on the forest floor, so predators are less likely to see it.

Which structure helps most birds pick up food and feed their young?

The picture shows a duck's webbed feet. Which other animal has feet shaped like this that help it swim?

A fish's gills take in oxygen from the air above the water, the same way lungs do.

Which animal structure helps keep a mammal warm in cold weather?

Many birds have hollow bones. These light bones make it easier for the bird to fly.

Which structure helps many animals grab, climb, or defend themselves?

What is one important job of fish scales?

A bat has large ears because it decided that it wanted to hear better in the dark.

Which internal structure supports an animal's body and protects organs?

Which internal structures work with bones to help many animals move?

The heart's main job is to pump blood through the body.

Which structure helps land mammals breathe air?

Which internal structure helps break down food so the body can use it?

A fence lizard's bumpy gray-brown skin matches the rock it rests on. How can this camouflage help the lizard get food?

An animal with wide, flat grinding teeth most likely tears meat from the animals it catches.

A beaver gnaws through tree trunks to cut down trees. Which teeth help it do this?

A seal has a thick layer of blubber under its skin. Besides keeping it warm, how can blubber help the seal when food is hard to find?

Insects often use antennae to sense smells, touch, or movement.

Which structure helps a frog catch insects?

How do large ears help many rabbits survive?

A thick layer of blubber under an animal's skin tells you the animal most likely lives in a hot, dry desert.

Which is an example of an external animal structure?

Which is an example of an internal animal structure?

Which structure helps many deer run quickly from predators?

A duck's webbed feet would dig a tunnel through packed soil better than a mole's wide clawed feet would.

How do octopus arms and suckers help an octopus survive?

Some birds use beaks and feet to build nests for their eggs and young.

Which animal structure is best matched with its function?