How Do Animals Change How Do Animals Change as They Grow?as They Grow?

The learner will:The learner will:

•Recognize that as an Recognize that as an organism grows, its organism grows, its appearance may change.appearance may change.

•Sequence pictures of a frog Sequence pictures of a frog from birth to adulthood.from birth to adulthood.

Animals change in size and Animals change in size and shape as they grow.shape as they grow.

A frog hatches from jelly-A frog hatches from jelly-like eggs.like eggs.

•Most frogs lay their Most frogs lay their eggs in water.eggs in water.

•Each female lays Each female lays thousands of eggs at thousands of eggs at a time.a time.

A frog begins life as a A frog begins life as a tadpole.tadpole.

•A tadpole has no legs.A tadpole has no legs.

•A tadpole has a tail.A tadpole has a tail.

•A tadpole looks like a small A tadpole looks like a small fish.fish.

•A tadpole lives in water.A tadpole lives in water.

As It GrowsAs It Grows

•The tadpole’s hind legs begin to The tadpole’s hind legs begin to grow.grow.

•The body becomes thicker.The body becomes thicker.

•The tail shortens.The tail shortens.

•The head becomes larger.The head becomes larger.

In a few weeks the tadpole In a few weeks the tadpole will be a frog.will be a frog.

•Adult frogs have legs.Adult frogs have legs.

•Adult frogs do not have a tail.Adult frogs do not have a tail.

•Adult frogs live on land.Adult frogs live on land.

Label the frog life cycle Label the frog life cycle diagram.diagram.

1.

SourcesSources• Life Cycle of a FrogLife Cycle of a Frog