Which of the following does not trigger an avalanche? a. skiing down a mountain c. heavy wind b. shouting loudly d. a sudden change in temperature

What can happen when an airplane flies through ash from a volcanic eruption? a. the entire plane melts c. the people inside get coated in dust b. the engines stop d. all of the above

Which force of nature kills the most people each year on average? a. extreme heat c. lightening b. tornadoes d. floods

True or False? The top speed of a Chevrolet Avalanche truck is faster than the top speed of a snow avalanche.

Dust storms are common in places with dry weather and what other feature? a. vast grasslands c. orange trees b. mountains d. very few plants

If a tsunami is traveling across the ocean at top speed, which of the following would match its pace? a. a jet airplane c. a speeding bullet b. a cheetah d. lightening

What is the best way to escape from quicksand? a. get a friend to pull you out c. wait for it to rain b. wiggle your legs around d. there's no way to escape it

Where was the biggest dust storm scientists have ever seen? a. mars c. the Sahara b. China d. Nebraska

If people cut down all of the trees on a mountain slope, which of the following may happen? a. ice storm c. landslide b. forest fire d. meteor strike

True or False? Scientists can predict earthquakes a week before they happen.

What is a large, rotating thunderstorm called? a. supercell c. lightening ball b. spin doctor d. tilt-a-whirl

In which country do most of the tornadoes on Earth occur? a. South Africa c. The United States b. Brazil d. Canada

True or False? A sinkhole can swallow up an entire building.