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This quiz consists of 5 multiple choice and 5 short answer questions through Part 5, Chapter 17.

Multiple Choice Questions

1. Astronomer Edmond Halley believed that the distance from the Earth to the sun could be deduced from the:
(a) Transits of Venus.
(b) Size of solar flares.
(c) Position of Mars.
(d) Distance to the moon.

2. When French physicist Henri Becquerel accidentally left a packet of uranium salts on a photographic plate, what happened?
(a) The plate became magnetic.
(b) The plate rusted.
(c) The salt crystals melted into the plate.
(d) An emission from the salts ruined the plate.

3. The strongest earthquake ever recorded was measured off the coast of Chile in 1960. What did it measure on the Richter scale?
(a) 7.8.
(b) 10.2.
(c) 8.9.
(d) 9.5.

4. Sir Isaac Newton wrote "Mathematical Principles of Natural Philosophy," which explains his laws of what?
(a) Motion and gravity.
(b) Quantum physics.
(c) Electromagnetic interference.
(d) Attraction.

5. 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) Distances to other planets.
(c) Weight of the sun.
(d) Weight of Earth.

Short Answer Questions

1. What is found at the very center of the Earth?

2. During the time of the dinosaurs, Earth's magnetic field was:

3. Approximately how many miles are there from Earth's surface to its core?

4. Anders Celsius, who designed the Celsius thermometer, was an:

5. 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?

(see the answer key)

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