Dinosaurs: Stegosaurus

1. True or false. Today, most scientists believe Stegosaurus used a "second brain" to control the back of its body.

True

False

2. The plates of Stegosaurus may have helped it to accomplish which of the following?

Glide between trees

Dive to great depths to find food

Attract mates

Make sounds somewhat like those of a xylophone

3. Stegosaurus has long been depicted as which of the following?

One of the most intelligent dinosaurs

One of the friendliest dinosaurs

One of the least intelligent dinosaurs

A blood-thirsty killing machine

4. Early scientists made mistaken assumptions about dinosaurs, partly because they incorrectly believed dinosaurs were closely related to this type of animal.

Crocodiles

Birds

Lizards

Turtles

5. How many spikes did Stegosaurus have at the end of its tail?

2

4

8

16

6. Scientists have proposed that the plates of Stegosaurus may have had which of the following functions?

To serve as armor

To regulate body temperature

For display

All of the above

7. Many scientists doubt the plates of Stegosaurus served as armor for which reason?

The plates protected only the sides of the dinosaur

The plates were thin and relatively fragile

The plates were made entirely of cartilage

All of the above

8. Scientists do not know why stegosaurs went into decline, but many believe this factor may have played a role.

They were unable to adapt to a colder climate

Their brains were too small

They gradually became blind because of cataracts

They could not compete with other plant-eating dinosaurs

9. The brain of Stegosaurus reached about the same size as which of the following?

A pea

A golf ball

A beach ball

None of the above

10. Stegosaurus lived about how many millions of years ago?

230 million years ago

150 million years ago

80 million years ago

55 million years ago