Select the one animal that has all of the fish traits listed above.
Goldfish hatch from eggs with no shells and have scaly skin. They are popular as pets in many countries today. They were first kept as pets by people in ancient China. Goldfish have fins and live underwater. Greater flameback woodpeckers have feathers and two wings. They use their strong beaks to make holes in trees. The woodpeckers use these holes as nests for their eggs, which have white shells.
Fish are a group of animals with similar traits. The following traits can be used to identify fish:
They have fins, not limbs.
They make eggs with no shells. Observe the animals and read the descriptions.
Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live.
How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, scientists compare the animal's traits to other animals' traits. Scientists classify animals with similar traits into a group.
To decide if an animal is part of a group, look at the traits of the group.
Fish have the following traits:
They have fins, not limbs.
They make eggs with no shells.
Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits.
A goldfish has the following traits:
It has fins, not limbs.
It makes eggs with no shells.
A goldfish has the traits of a fish. A goldfish is a fish.
A greater flameback woodpecker has the following traits:
It has feathers.
It has wings.
It has a beak.
It makes eggs with shells.
A greater flameback woodpecker does not have all of the traits of a fish. A greater flameback woodpecker is a bird.