What is Chicxulub (pronounced Chik-shu-lub)?
A hot new dance craze.
An impact crater caused by an asteroid collision.
A crater on the Moon.

	What do scientists think caused the extinction of dinosaurs?
The dust from an asteroid collision blocked out the sun, cooling the Earth.
An asteroid knocked one on its head and they all fell over like dominoes.
An asteroid collision released toxins into the atmosphere.

	What’s the difference between comets and asteroids?
Comet is one of Santa’s reindeer, and Asteroids is a video game.
Comets are chunks of dirty ice and asteroids are giant rocks.
Comets are giant rocks and asteroids are chunks of dirty ice.