Classifying Animals

Why do scientists classify animals?

• to organize information

• to learn more about animals

• to show relationships

• all of the above

Which is not a way scientists classify animals into groups?

• by how much they weigh

• by their body covering

• by whether they are cold-blooded or warm-blooded

• by whether they are vertebrates or invertebrates

Which animal is not cold-blooded?

• a fish

• a mammal

• a reptile

• an amphibian

How are animals that have backbones classified?

• as vertebrates

• as invertebrates

• as insects

• as jellyfish

Mammals are...

• warm-blooded, vertebrates and have fur or hair.

• cold-blooded, invertebrates with scales.

• warm-blooded, invertebrates with smooth moist skin

• cold-blooded, vertebrates with feathers

Fish are

• Cold-blooded, invertebrates with smooth moist skin

• cold-blooded, invertebrates with scales

• warm-blooded, vertebrates with fur

• Cold-blooded, vertebrates with scales

Reptiles are

• Cold-blooded, invertebrates with moist skin

• warm-blooded, vertebrates with scales

• Cold-blooded, vertebrates with scales

• warm-blooded, invertebrates with fur

Birds are

• cold-blooded, vertebrates with fur

• Warm-blooded, vertebrates with feathers

• Warm-blooded, invertebrates with scales

Amphibians are

• cold-blooded, invertebrates with scales

• warm-blooded, vertebrates with moist skin

• Cold-blooded, vertebrates with moist skin

• warm-blooded, vertebrates with feathers