How Animals Live?

How do different animals live, grow, and change?

All animals need water, oxygen, food, and shelter Animals can be classified, or divided, into two groups.

Those that have a backbone. Those that don’t have a backbone.

A backbone is a series of bones that run down the back of some animals.

An animal that has a backbone is called a vertebrate

Classifying Vertebrates

A body feature passed on toan animal from its parents is calleda trait. Traits can include things an

animal does.

A Vertebrate such as this horse has a skeleton inside its body.

What is the series of bones that runs down

my back called?

A. Root stem

B. backbone

C. Vertebrate

Vertebrates can be classified into several smaller groups. One of these groups is the mammal group. A mammal is an animal that has hair/fur and produces

milk for its young. They need oxygen, a gas in the air, to live and they

breath the air with their lungs. Most mammals have a thick coat of hair or fur that

Traps air against their body for warmth.

Mammals

Sea lions are mammals that live both in water and on land. Even Mammals that live in water have lungs and most breath air.

What are two traits ofMammals?

A bird is a vertebrate that has feathers, wings, and two legs.

Birds lay eggs that have hard shells.

Most birds can fly.

Feathers keep a bird warm, but are light so they do not

weigh the bird down.

Birds

Bird of Paradise are found in western Indonesia, Papua New Guinea, and eastern Australia. The members of this family are perhaps best known for the plumage of the males of most species.

How are the bodiesof mammals and birds alike and

different?

Fish are vertebrates that live in water.

Fish have long, narrow bodies that make it easy to move

through water.

Fish are vertebrates that live in water.

Most fish are covered with scales that protect them.

Like all animals fish need oxygen to live, but they don’t

have lungs. Instead they breath through gills.

Fish

All fish have backbones. Sharks and Rays have backbonesMade of cartilage, a material that is softer than bone.

What are two traits of fish?

An amphibian is a vertebrate that starts life in water and

then lives on land as an adult.

Amphibians lay eggs in water and their young breath

through gills and have tails to help them swim.

As the young grow, their bodies change. Lungs and legs

grow and gills disappear.

After an amphibians body changes, they live on land.

Amphibians

Frogs have wet, smooth skin. Wet skin prevents their bodies from drying out on land.

An animal lives in water, has fur, and breatheswith lungs. Would you

classify it as a bird,a mammal, a fish, or an amphibian?

A reptile has dry, scaly, skin and lays eggs on land.

The scales protect them from the hot sun

Reptiles can live in many different environments.

Some use legs to move, others slither on the ground.

All reptiles breath with lungs and reptiles that spend a lot

of time in water must stick their noses out to breath.

Reptiles

Why do alligators and crocodiles

have to stick their noses out

of the water?

Directions: If you think the animal is a mammal, circle it. If it’s a fish, put an X through it. If you think it’s a bird, box it. If you think it is a reptile, triangle it.

Animal Classification

Game

Animals without a backbone

includes sea stars, butterflies, and spiders

Many invertebrates are very small

a soft sac filled with liquid supports worms and sea jellies

Insects and other arthropods have a hard covering on the

outside of their bodies.

Invertebrates

Major Kinds of Invertebrate Animals

Directions: If you think the animal is a sea jelly, circle it. If it’s a worm, put an X through it. If you think it’s a Mollusk, box it. If you think it is a arthropod, triangle it.

Chapter two lesson one and two

• Quiz – log in to Mr. Elliott’s website and go to 3rd grade science interactive. At the very bottom under files you will find Ch. 2-1 quiz. Open it and finish the quiz. Print off when finished.

Amphibian life cycle

Frog Eggs

Tadpole

Tadpole changing into frog

Adult frog

Salamander turning into an adult

adult Salamander

Assignment:

Make an illustration that shows the life cycle of an amphibian.

The picture should show these stages:Egg

Young living in waterChanging into an adult

Adult living on landPlease choose a frog, a toad, or a salamander.