life science unit a chapter 2 animals. animals with bones scientists group animals by body parts...

Life Science

Unit A Chapter 2

Animals

Animals with Bones

• Scientists group animals by body parts

• Some animals have bones inside their bodies.

• They are called vertebratesvertebrates– Mammals– Reptiles– Amphibians– Birds– Fish

External Characteristics

• Scientists classify animals within the vertebrate group by other external characteristics.

Mammals•have fur or hair

•breathe with lungs

•Have live young

•Feed young milk from their bodies

Birds•have feathers

•breathe with lungs

•have back bones

Reptiles•have dry, scaly skin

•breathe with lungs

•have backbones

Amphibians•have moist, smooth skin

•breathe with gills first, then lungs

•have backbones

Fish•have scales

•breathe with gills

•have backbones

Animals without bones

• Some animals have parts like bones outside their bodies.

• They are called invertebrates.invertebrates.

• They have no backbones.– Insects– Worms– Snails– Squids– octopus

Insects•do not have inner bones

•have outer skeleton---exoskeleton

•breathe with air tubes

Life Cycle

• All the parts of an animal’s life from birth to death

Life Cycle of a Frog

Egg/spawn

tadpole

Back legs grow

Front legs grow

Adult frog

egg

hatchling

Egg hatching

chick

adult

Life Cycle of a Butterfly

Animal habitats •Where an animal lives

•Temperatures are different—hot or cold

•Rainfall is different—can be wet or dry

•An animal’s food, water, and shelter are found in its habitat

•If the habitat changes, the animal can become

•This means there are very few of that animal still living.

endangered.

Food Chain--plants use energy from the sun to make food

--animals eat plants for food —larger animals eat the smaller animals for food

Behavior

An action of an animal that can help it survive

Camouflage—protective

coloring that helps the animal blend intoits surroundings

How do fish get oxygen?

Click the fish to learn how fish breathe

A webbed foot is best adapted for:

A. catching and holding insects

B. moving around in the water

C. holding on to small branches

D. digging burrows in hard ground

All of the characteristics listed for a scorpion are useful for survival in a

hot, dry climate EXCEPT-

A. 1

B. 2

C. 3

D. 4

What is the main function of the wings on a bird?

A. fighting other birds

B. hiding from other animals

C. flying

D. picking up food

Why is the tiger’s fur striped?

A. to keep them warm in the winter

B. to help them hide in the tall grass where they live

C. to warn other animals that they are poisonous

D. to keep insects from biting them

Which adaptation is most helpful to an animal that catches other animals for

food?

A. thick layer of fat and fur

B. sharp teeth and claws

C. legs that are long and thin

D. tiny eyes and ears

A fish has fins and gills because--

A. it lives in water

B. it lives on land

C. it flies in the air

D. it lives underground

Why do giraffes have long legs and necks?

A. to drink water more easily

B. to hear the birds at the top of the trees

C. to run faster

D. to reach more leaves on tall trees

Why does a squirrel gather and store nuts?

A. to build its home

B. to have food for winter

C. to give away

D. to plant more trees

Which of these helps a duck swim in water?

A. a big bill or beak

B. webbed feet

C. wings

D. claws

A fox has sharp teeth to help it---

A. run fast

B. catch and eat its food

C. hear well

D. smell for danger

What does a fish use to help it swim?

A. arms

B. legs

C. fins

D. toes

Owls are asleep during the day and awake at night. For this reason,

they---

A. have sunglasses to see during the day

B. have big eyes to see in the night

C. don’t need to eat

D. are scared to fly

Lions have sharp teeth to help it to---

A. climb trees

B. breathe

C. run fast

D. tear and eat meat

What helps a polar bear live in cold weather?

A. long legs

B. warm, thick fur

C. small feet

D. big eyes

What does a bird use its wings for?

A. to fly

B. to swim

C. to walk

D. to hop

How are a fish and a duck alike?

A. They both have fins.

B. They both live in a tree.

C. They both eat pizza.

D. They both live in the water.

Which of the following is something that a person NEEDS to live?

A. toys to play with

B. candy to eat

C. a bicycle to ride

D. air to breathe

The life cycle of a butterfly has how many stages?

A. 1

B. 2

C. 3

D. 4

Which of these animals start life looking like their mother?

A. frog

B. butterfly

C. cat

D. chicken

In the life cycle of a butterfly, which stage is the caterpillar?

A. 1st

B. 2nd

C. 3rd

D. 4th

The tails and fins of a fish help the fish to

A. breathe underwater

B. chew its food

C. see larger fish

D. move in its habitat

To survive in their environment, living things--

A. stay the same

B. melt on a hot day

C. grow and change

D. need books to read

An earthworm belongs in Box A because it---

A. swims in a pond

B. eats leaves of plants

C. makes its home underground

D. grows fur in the winter

The length of the ant is..

A. 0 cm.

B. 1 cm.

C. 2 cm.

D. 3 cm.

The best title for the picture would be...

A. Butterflies of the United States

B. Life Cycle of a Worm

C. How Eggs Hatch

D. Life Cycle of a Monarch Butterfly

Which animal completes the food chain?

A.

B.

C.

D.

Which of these animals begins life in an egg in a nest?

A. human

B. fish

C. cricket

D. bird