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Astronomy Quiz
Moon phases, eclipses, tides, sun facts
| stuff | ya know |
|---|---|
| How long is a full tidal cycle? (two high and two low tides) Why is it such an odd number? | 24 hours and 50 minutes because it takes Earth 24 hours to rotate, then 50 extra minutes to catch up to the moon. |
| Is there any correlation between tides and time of day? Why/why not? | Yes, the low tides occur when the moon rises and sets while the high tides occur when the moon is the highest and technically the lowest. |
| How many high tides occur each day? Low tides? | 2 each |
| How long after do the tides occur each day (high to low and high to high)? | Just about 6 hours and about 12 hours. |
| What percent does the moon's gravity have affect on tides? | 90 percent |
| What percent does the sun's gravity have affect on tides? | 10 percent |
| centripetal force | a force that pulls Earth and the moon toward their center point of gravity |
| centrifugal force | an apparent force that acts outward on a body moving around a center, arising from the body's inertia. |
| Is Earth's circumference greater at the equator or poles? | equator |
| How many days does it take for the moon to rotate? | 27.3 days |
| How many days does it take for the moon to complete a revolution? | 27.3 days |
| Which side does the light appear on when the moon is waxing? | the right side |
| Which eclipse is the moon between the sun and Earth? | solar |
| umbra | the darkest part of the moon's shadow during a solar eclipse |
| How do equinoxes and solstices differ? | Equinoxes occur when neither hemisphere is tilted toward the sun, creating equal day and night. Solstices occur when one hemisphere is tilted toward the sun, which ever tropic receives the brunt of the sun's rays experiences their summer solstice. |
| What causes umbras and penumbras? | The moon's shadow on Earth, along with the fact that the sun's rays move in straight lines. |
| When do new moons rise? | sunrise |
| When do new moons set? | sunset |
| When do first quarter moons rise? | noon |
| When do first quarter moons set? | midnight |
| When do full moons rise? | sunset |
| When do full moons set? | sunrise |
| When do last quarter moons rise? | midnight |
| When do last quarter moons set? | noon |
| How many moon phases occur in a week? | two |
| Why do we see the same side/face of the moon? | Its rotation time and revolution time are the same for every revolution, one rotation occurs. |
| How big is the umbra usually in a solar eclipse? | about 120 miles across |
| How big is the penumbra usually in a solar eclipse? | hundreds of miles across |
| How are the sun, moon, and Earth lined up in a lunar eclipse? | sun, Earth, and the moon |
| How much of the mass in the solar system does the sun account for? | 99 percent |
| How old is the sun? | about 4.6 billion years old |
| How much greater is the sun's mass than the earth's? | 333,000 times greater |
| What is the sun's surface temperature? | roughly 11,000 degrees farenheit |
| How many Earths could fit in the sun? | a million |
| How long do the sun's rays take to reach Earth? | 8 minutes |
| What is the speed of light? | 186 thousand miles per seconds |
| What is the most widely accepted distance between Earth and the sun? | 93 million miles |
| How long before the sun swallows the Earth? | 130 million years |
| How long will it be before the sun dies out? | 5 billion years |
| rotation | when an object spins about it's axis |
| How long does it take for Earth to rotate? | 23.6 hours |
| revolution | when an object moves around another object |
Created by:
crosscountrygirl9.24
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