Classification of Animals

Question 1

Classify means to _________ animals by their shared characteristics.

Answer 1

group

Question 2

A vertebrate is _____________________.

Answer 2

an animal with a backbone

Question 3

Are most animals vertebrates or invertebrates?

Answer 3

invertebrates

Question 4

Taxonomists believe that all vertebrate animals can be classified into one of _____ groups.

Answer 4

5

Question 5

The five groups of vertebrates are ______________.

Answer 5

fish, amphibians, reptiles, birds, and mammals

Question 6

Fishes’ body temperature _______________ with their surroundings.

Answer 6

changes

Question 7

Constant means it stays the same ________ of the time.

Answer 7

most

Question 8

Fish, reptiles, and amphibians are three groups of _____________________ creatures.

Answer 8

cold-blooded

Question 9

Warm-blooded animals regulate their internal body temperatures and keep them ______________.

Answer 9

constant

Question 10

An animal’s backbone, or spine, starts near its head and runs all the way down its back to its ___________.

Answer 10

hips

Question 11

Your spine protects your ________________,

Answer 11

spinal chord

Question 12

What is the biggest group of invertebrates?

Answer 12

insects

Question 13

The largest group of vertebrates on Earth is ______.

Answer 13

fish

Question 14

Do fish have lungs?

Answer 14

no

Question 15

The breathing organs of fish are called ________.

Answer 15

gills

Question 16

What helps a fish move through water?

Answer 16

fins

Question 17

Fish have hard overlapping ____________ that protect them and help them move more easily through the water.

Answer 17

scales

Question 18

Toads must lay their eggs in ___________ because their soft jelly-like coverings can easily dry out in the air.

Answer 18

water

Question 19

Morphing means _________________ into very different looking creatures.

Answer 19

changing

Question 20

What is an important organ in amphibians that must stay wet for them to breathe?

Answer 20

skin

Question 21

Most reptiles can adjust their body temperature by _____________________.

Answer 21

basking in the sun

Question 22

What do reptiles use to breathe?

Answer 22

lungs

Question 23

Reptiles scaly skin protects them from overheating, and because their skin is waterproof, it keeps water _________ their bodies.

Answer 23

inside

Question 24

Reptiles lay their eggs in ___________ on land.

Answer 24

nests

Question 25

Are birds vertebrates?

Answer 25

yes

Question 26

Birds’ bones are extremely light with lots of cavities inside them to help them ___________.

Answer 26

fly

Question 27

All birds lay _______________.

Answer 27

eggs