3rd Grade Ch. 2 Lesson 2 How do Animals Grow & Change

Ch. 2 Lesson 2

How do animals grow & change?

Birth born or hatch

Growth get biggerDevelopment change into adults

Reproduction produce young

Death lives come to an end

Life Cycle Stages of Animals

Egg Larva Pupa Adult

Life cycle of insectsLife cycle of insects (monarch butterfly) (monarch butterfly)

•covered in hard coating (chrysalis)

•caterpillar

Butterfly life cycle activities

egg

larvapupa

adult

4. adult

3. growing tadpole

2. tadpole (larva)

1. egg

Frog Life Cycle

mammal life cycleHave less changes in their life cycle than insects or amphibiansDevelop inside mom’s bodyBabies drink mom’s milk

Draw, color and label a picture of each of the following life cycles:

1. Insect (butterfly) life cycle

2.Frog life cycle

3.Mammal life cycle

Birth born or hatch

Growth get biggerDevelopment change into adults

Reproduction produce young

Death lives come to an end

Life Cycle Stages of Animals

What is the purpose of the pupa?

• To protect the butterfly as it changes into an adult.

List the sequence of steps in a butterfly’s life cycle. Use the signal words first, next, then, and finally.

• First, an egg is laid.• Next, a larva, or caterpillar, hatches. • Then, the larva spins a covering around

itself and becomes a pupa. • Next, a butterfly crawls out. • Finally, adult butterflies mate and lay

eggs.

Before a frog can live on land, how must its body change?

• A frog must grow lungs so that it can breathe air and powerful legs to propel itself forward.

How is a mammal’s life cycle different from a frog’s or butterfly’s

life cycle?• A mammal develops inside its

mother, is born looking like its parents, and does not change a lot in its life cycle.

• A frog or butterfly develops in an egg that the mother lays, hatches, and changes a lot in its life cycle.

Think about how mammals care for their young.

Describe why this kind of care might be helpful for most mammals.

• Young mammals are fed and protected until they learn how to live on their own and grow large enough to protect themselves.

Name and circle the correct

phase in the butterfly’s life cycle.

It is also known as a caterpillar.

It’s body changes a lot, growing wings and

jointed legs.

It’s life cycle begins.

The adult butterfly

comes after this stage.

It is able to lay eggs.

It is covered in a hard coating (chrysalis).