2. An asteroid strike on Earth would most likely affect the climate for how long?
(a) 10,000 years.
(b) 5 years.
(c) 500 years.
(d) 1 million years.

3. Halley believed that once scientists figured out the distance from the sun to the Earth, they could then calculate what?
(a) Distances to distant stars.
(b) Weight of Earth.
(c) Distances to other planets.
(d) Weight of the sun.

4. Who suggested that mass and energy are actually the same thing?
(a) Thomas Edison.
(b) Charles Darwin.
(c) Albert Einstein.
(d) Joseph Lister.

5. Had the universe formed just slightly differently:
(a) Mankind would not exist.
(b) Planets would be flat instead of round.
(c) Our solar system would have ten times more planets.
(d) Earth would have seven moons.

6. In 1875, why was Max Planck advised against studying physics and urged to study math instead?
(a) Planek knew high-level math but only very basic physics.
(b) A career in math offered greater financial opportunities for him.
(c) The government often arrested those who delved in certain branches of physics.
(d) It was believed that all the important physics discoveries had already been made.

7. In 1971, Mike Voorhies discovered an amazing fossil bed in Nebraska full of skeletons of prehistoric animals killed 12 millions years ago. How did they die?
(a) Frozen in a freak snowstorm.
(b) Infected by deadly bacteria.
(c) Drowning in a massive flood.
(d) Inhaling ash spewed by a volcano.

8. According to the Reverend William Buckland, the biblical reference to "in the beginning" with regards to the formation of Earth could refer to:
(a) Myths and legends.
(b) Millions and millions of years.
(c) Exactly seven days.
(d) A particular era.

9. Invented in the 1930s, chlorofluorocarbons (CFCs) have proven to be damaging to:
(a) The ozone layer.
(b) The tourism industry.
(c) Refrigerator production.
(d) Underground caves.

10. Today, scientists know that radiation in high doses is:
(a) Toxic.
(b) Safe.
(c) Tolerable.
(d) Healthy.

11. Which famous scientist was once an unknown patent clerk in Switzerland?
(a) Albert Einstein.
(b) Thomas Edison.
(c) Joseph Lister.
(d) Charles Darwin.

12. What components were central to the apparatus that Henry Cavendish used to determine the density of Earth?
(a) Boiling water, a tub, and a barrel.
(b) Chutes and slides.
(c) Weights, counter-weights, and pendulums.
(d) A burner, gases, and switches.

13. When radiation was first discovered, people thought it must have:
(a) Been caused by thunderstorms.
(b) Healthful properties.
(c) An extraterrestrial origin.
(d) High toxicity.

14. Using a depth sounder during World War II, Harry Hess discovered that ocean floors:
(a) Have swirling sand drifts.
(b) Are too deep to be measured.
(c) Have canyons and trenches.
(d) Are flat.

15. Earth is the only planet in the solar system to have what?
(a) Plate tectonics.
(b) Mountains and valleys.
(c) Moons.
(d) Storms.