1. In 2003, NASA came up with an estimated age of the universe. What was it?
(a) 103.5 million years.
(b) 731 trillion years.
(c) 35 million years.
(d) 13.7 billion years.

2. According to Einstein's theories, what is the nature of space?
(a) It is a flat plane.
(b) It has missing points.
(c) It is a straight line.
(d) It curves.

3. The Geiger counter is a:
(a) Voltage meter.
(b) Radioactivity detector.
(c) Magnetic imager.
(d) Molecular microscope.

4. Approximately how many miles are there from Earth's surface to its core?
(a) 3,959.
(b) 695.
(c) 45,599.
(d) 595,399.

5. Arranged side by side, how many atoms can fit across the width of a typical human hair?
(a) Five hundred.
(b) Half a million.
(c) Half a trillion.
(d) Five thousand.

Short Answer Questions

1. Scientists eventually figured out that certain unusual rocks near Manson, Iowa, were not because of ancient volcanic activity as they first surmised, but the result of what?

2. How quickly can bacteria create a new generation?

3. When was Pluto discovered?

4. Which famous scientist was once an unknown patent clerk in Switzerland?

5. In times past, Earth was:

(see the answer key)

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