| Term | Definition |
|---|
| Astronomy | the study of moon, stars, and other objects in space |
| axis | an imaginary line that passes through Earth's center and the North and South poles |
| rotation | the spinning motion of earth |
| revolution | the movement of one object around another |
| orbit | the path of an object as it revolves around another object in space |
| Day | a 24 hour cycle of day and night is called _______? |
| Earths rotation on axis | what causes day and night? |
| Leap Year | when an extra day is added every 4 years because of the romans |
| Winter | When it is summer in the Northern Hemisphere it is _______in the Southern Hemisphere. |
| daylight | In June, there are fewer hours of ________ and less direct sunlight in the Southern Hemisphere. |
| Solstice | Each of the two days when the noon sun is farthest north of south of the equator |
| Equinox | each of the two days when neither hemisphere is tilted towards or away from the sun |
| Summer Solstice | June 21, longest daytime, northern hemisphere is tilted towards the sun |
| Autumnal Equinox | september 22, Daytime is same length as night |
| Winter Solstice | December 21, shortest daytime, southern hemisphere is tilted towards the sun |
| Vernal Equinox | March 21, Daytime is same length as night |
| Gravity | The force that attracts two objects towards each other |
| Inertia | The tendency of an object to resist a change in motion |
| The Law of Universal Gravitation | What law states that every object in the Universe attracts every other object? |
| Mass and Distance | What two factors determine the strength of the force of gravity between two objects? |
| increases | if mass increases and distance stays the same, then the force of gravity...? |
| decreases | if mass decreases and distance stays the same, then the force of gravity...? |
| increases | if mass stays the same and distance decreases, then the force of gravity...? |
| decreases | if mass stays the same and distance increases, then the force of gravity...? |
| Inertia and Gravity | what two factors did Isaac Newton conclude kept the planets in orbit? |
| Earth's Gravity | What pulls the moon towards Earth? |
| Inertia | what keeps the moon moving ahead? |
| 29.5 days | how many days does it take for a complete moon cycle to take place? |
| True | True or false: a day and a year on the moon are the same length |
| True | True or false: the same side of the moon always faces earth |
| False | True or false: the moon revolves around earth once a year |
| Positions of the earth, sun, and moon | What causes the phases of the moon, eclipses, and tides? |
| phases | the different shapes of the moon you see from earth are called...? |
| how much sunlight hits the moon | what does the phase of the moon you see depend on? |
| New moon | when the side of the moon facing earth is dark |
| first quarter | when you can see half of the sunlit side of the moon |
| full moon | when the entire sunlit side of the moon faces earth |
| third quarter | the second time you can see half of the sunlit side of the moon |
| A Lunar Eclipse | when the moon's shadow hits Earth or Earth's shadow hits the moon, what occurs? |
| Solar and Lunar | what are the two types of eclipses? |
| A Solar Eclipse | what occurs when the moon passes directly between the earth and the sun? |
| penumbra | the larger, less dark part of the shadow |
| Sun, Earth, Moon | what is the alignment of the earth, sun, and moon during a lunar eclipse? |
| Tides | the rise and fall of ocean water |
| spring tide | a combined sun and moon force with the greatest difference between low and high tide |
| neap tide | a tide with the least distance between high and low tides |
| Maria | dark, slat areas formed from hardened rock from lava flows. |
| crater | round pits on the moon caused by meteors |
| Highlands | mountains on the moon |
| 1/4 | the moon's diameter is about how much of earth's? |
| Atmosphere | what does the moon lack that earth has? this is why the temperatures vary so much |
Combine with other sets
Share on Facebook
Share on MySpace
!
