Mammals have this all over their body to help keep them warm and for other reasons.
Fur or hair
100
These are on the outside of a fish’s body. They can feel smooth or rough.
Scales
100
These cover a reptile's body.
Scales
100
Birds lay these to have babies.
Eggs
100
An insect has this many body parts.
Three
200
Mammals use these to breathe. Remember, they do not have gills!
Lungs
200
Fish are born out of these.
Eggs
200
Amphibians’ skin is moist and _________.
smooth
200
Birds are the only animals that have these to cover their skin.
Feathers
200
An insect has this many legs. Remember, a spider is not an insect!
Six
300
This is what baby mammals drink. The mother mammal feeds this to her baby.
Milk
300
Fish take in water through their mouth and this part of the fish's body filters the oxygen, letting the water pass through. The water is then pushed out.
Gills
300
This is what reptiles do when they get too cold and slow way down.
Hibernate
300
This is a characteristic of birds. They can use these to get food.
Beak
300
Insects are an example of this. It means that the animal does not have a backbone. Insects have a hard outer body instead of bones on the inside.
Invertebrate
400
This is the largest mammal in the world.
Blue Whale
400
Although these animals look and sometimes act similar to fish, they are different in many ways.
Whales
400
Reptiles are this. It means that the reptiles need to find somewhere warm if they are too cool and somewhere cooler if they are too warm.
Cold-blooded
400
Not all birds can fly. This is a kind of bird that does not fly. Some of them live in Antarctica.
Penguins
400
Insects have three body parts. This body part is the body part that the legs come out of. If the insect has wings, they will also come out of this part its body.
Thorax
500
Mammals are this. It means that their body temperature stays the same whether it is cold or warm in their environment.
Warm-blooded
500
Fish need this to help them survive. They use this even though they live under water.
Oxygen
500
Amphibian means this. It means that amphibians begin life in the water and later live on the land.
Two Lives
500
Birds have a backbone. That makes them this kind of animal.
Vertebrate
500
Insects have three body parts. This is the part of its body that is like its tail.