Earth & Space Benchmark

We are able to see Halley's comet approximately every 76 years. If the last time was 1986, when will be the next time?

• 2024

• 2061

What is the reason that Halley's Comet can be seen during specific years?

• It orbits the sun in a cyclic & predictable pattern

• because of the moon's phases

About how long does it take the moon to go from one Full Moon to the next Full Moon?

• one day

• one month

Why are the motions of planets & asteroids predictable?

• because they are in orbit around the sun

• because they are shaped like a sphere

When does North America experience the most hours of daylight?

• December 21

• June 21

How would you describe Earth's shape and why?

• a perfect sphere because the diameter across the equator is the same as the diameter between the poles

• almost a perfect sphere because the diameter across the equator is slightly larger that the diameter between the poles

Why does it look like the sun rises in the east, moves across the sky, and sets in the west?

• The sun's rotation on its axis

• Earth's rotation on its axis

How long does it take to go from one high tide to the next high tide?

• 24 hours

• 12 hours

About how many weeks does it take to go from a first quarter moon to a third quarter moon>

• two

• six

What affects the amount of gravity between 2 objects?

• mass & distance apart

• how high in the sky the objects are