Animals Through Time

Scientists think there used to be an ocean in the middle of the United States because...

• there is seaweed growing in Illinois.

• they read a book that said so.

• they found fossils of ocean animals underground.

• the soil is salty.

Scientists found a whale in the middle of the desert because...

• whales live in the desert.

• whales used to live in the desert.

• there was a lake in the desert.

• the desert used to be an ocean.

One reason that scientists think that dinosaurs looked like reptiles on the outside is because...

• reptiles also eat meat and plants.

• reptiles have two openings in their skulls.

• there is no fossilized fur.

• dinosaur's blood was cold too.

Scientists can figure out how fast dinosaurs ran by...

• watching video of dinosaurs running.

• measuring the size of their footprints.

• using a stopwatch to time how fast they run.

• measuring the distance between dinosaur footprints.

There are so many different kinds of dogs because...

• people mated dogs that had qualities people wanted and their babies had those qualities too.

• the dogs want to be different from each other.

• the babies are different from their parents.

• dogs have a lot of babies.

The green anoles were such good climbers because...

• they liked climbing trees.

• people bred them that way.

• they liked the insects high up in the trees better than the ones below.

• they had more toe scales to get away from the brown anoles who aren't good climbers.

Animals with sharp, pointy teeth most likely eat...

• meat or fish.

• plants.

• insects.

• fruit.

Animals with flat teeth most likely eat...

• meat or fish.

• plants.

• insects.

• fruit.

An example of selection is breeding only iguanas that are blue in order to get the bluest iguana possible.

• True

• False

What habitat was Nebraska when the animal above lived there?

• desert

• ocean

• polar

• forest/jungle