Science Chapter 2 Review

Which characteristic is most likely a mammal?

• breathes with gills

• gives live birth

• does not have a backbone

• builds a nest

A scientist is observing animals in a forest. What should the scientist use to classify animals there?

• how much she likes the animals

• how difficult the animals are to find

• the number of times she sees the animals

• the characteristics of the animals she observes

Which BEST explains why scientists classify different animals?

• to better use them

• to better understand them

• to find ways to be like them

• to find ways to change them

Penny spotted an animal in a tree. Which characteristic should he look for to be sure the animal is a bird?

• legs

• claws

• wings

• feathers

What classifies animals as a vertebrate?

• A tail

• Breathes air

• Lived on land

• A backbone

Which kind of invertebrate animal has a round body and tentacles used to sting other animals?

• jellies

• sponges

• worms

• arthropods

What do mollusks use to move around?

• pores

• tentacles

• jointed legs

• muscular foot

Jacob is looking at an invertebrate. Which characteristic would tell him that he is looking at an insect?

• It can fly.

• It has eyes.

• It has six legs.

• It can live in water.

Which characteristic can a scientist use to classify an animal as a fish?

• gills

• joints

• lungs

• shells

Megan has a pet that hatched from an egg and lives in a tank of water. How would she know if her pet is an amphibian?

• it it makes milk

• if it grows legs later on

• if it uses tentacles to move

• if it has many eyes and antennae