Term
| What revolves around the solar system? |
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Definition
| The sun and all the celestial bodies that revolve around it. |
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Term
| What is in the solar system? |
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Definition
| Asteriods, comets, meteroids, moons, natural satellites, and the eight planets. (Pluto used to be the ninth planet). |
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Term
| What are the planetary motions? |
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Definition
| The planetary motions are a rotation, a revolution, and an orbit. |
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Term
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Definition
| A rotation is a planet spinning on its axis all day for 24 hours. |
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Term
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Definition
| A revolution is when the planets move around the sun for one year and 365 1/4 days. |
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Term
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Definition
| An orbit is the path of the planets, asteroids, and comets. |
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Term
| What is the shape of the orbit? |
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Definition
| The shape of the orbit is elliptical(oval shaped). |
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Term
| How many focuses or foci does an ellipse have? What is one of the foci? |
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Definition
| An ellipse has two foci and the sun is one of them. |
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Term
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Definition
| Planets are slightly elliptical. |
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Term
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Definition
| Comets are highly elliptical. |
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Term
| All planets rotate _____to_____rotation except for the planet_______. The planet_______roates_____to______instead. ________travels on its side. |
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Definition
| All planets roate west to east rotation except for the planet Venus. The planet Venus roates east to west instead. Uranus travels on its side. |
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Term
| How many fixed points, which are called foci, does an ellipse have? |
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Definition
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Term
| What is the major axis of an ellipse? |
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Definition
| The major axis of an ellipse is the longest staright-line distance across an ellipse. |
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Term
| What is eccentricity? What is the eccentricity of a circle and a straight line? |
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Definition
| Eccentricity is how flat or oval an ellipse is. The eccentricity of a circle is 0 and the eccentricity of a straight line is one. |
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Term
| What happens when the closer the foci is from eachother? |
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Definition
| The closer the foci is from eachother, the closer the ellispe is to the circle. |
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Term
| What happens when the farther the foci is from eachother? |
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Definition
| The farther the foci is from eachother, the closer it is to a straight line. |
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Term
| What is inertia? Explain the definition in your own words. |
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Definition
| Inertia is the concept that an object at rest will continue to remain at rest and that an object in motion will maintain the same direction and speed of that motion unless an outside or opposing force affects it. |
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Term
| What is gravitation? Explain the definition in your own words. |
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Definition
| Gravitation is the attractive force that exists between any two objects in the universe. |
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Term
| What would inertia make a planet do? |
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Definition
| Inertia would make a planet travel in a straight line. |
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Term
| __________between the planet and the sun pulls the planet toward the sun. |
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Definition
| Gravitational attraction between the planet and the sun pulls the planet toward the sun. |
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Term
| ______is a balance between inertia and gravity. |
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Definition
| The orbit is the balance between inertia and gravity. |
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