Crash!

A large asteroid probably_______.

• built the pyramids

• made the stars

• created the Rocky Mountains

• killed the dinosaurs

Scientists try to _____.

• get fuel from comets

• ride comets

• make asteroids

• follow asteroids

Scientists think an asteroid____.

• caused the Grand Canyon to form

• sank the "Titanic" in 1912

• hit Russia in 1908

• caused the U.S. Civil War

What covers most of Earth?

• deserts

• oceans

• asteroids

• mountains

How do experts find an asteroid?

• They send up fighter jets.

• They use weather balloons.

• They look through a telescope.

• They watch birds flying.

When did the asteroids form?

• when scientists invented them

• after the first plants grew

• after the dinosaurs disappeared

• when the planets were forminmg

When an asteroid hit earth, what happened?

• Bright light filled the sky.

• The air got very hot.

• Rocks slammed into the ground.

• All of the above.

An asteroid can be as big as a____?

• small planet

• bus

• car

• airplane

The path that objects follow around the sun is called ____?

• gravity

• earth

• an orbit

• a telescope

If Apophis hit earth in 2036 what could happen?

• It would jolt the Earth.

• It would burn up a large area.

• Huge rocks would fly up from the earth.

• All of the above.