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

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

Which natural disaster destroyed a nuclear power plant in Japan in 2011? a. hurricane c. tsunami b. tornado d. volcano

What does a seismograph measure? a. the size of a hail ball c. the depth of a flood b. the strength of an earthquake d. the color of quicksand

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

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

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? A sinkhole can swallow up an entire building.

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

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

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

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