Marano- Astronomy and Astronomers
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| astronomy | the study of all physical objects beyond the Earth's atmosphere
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| calendar | system for organizing time based on astronomical observations
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| year | time needed for a planet to make one complete orbit around the sun
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| revolution | one complete orbit
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| How long does it take earth to make one revolution | 365.242 days
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| What is our calendar called? | Gregorian
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| Leap year | happens every four years, add 1 day to calendar
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| Month | time needed for moon to orbit the Earth
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| day | time needed for a planet to turn itself on its axis of rotation
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| Angle of earth's rotation | 235 degrees
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| How long does it take for the earth to make one rotation? | 24 hours
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| Why do we have day and night? | only half the Earth can face the sun and have daylight
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| Ptolemy | Geocentric model- earth is center of universe
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| Copernicus | Heliocentric- sun is the center of the universe
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| Brahe | Believed that planets revolve around sun, but sun and moon revolve around Earth
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| Kepler | believed that planets revolve around sun in elliptical orbits
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| Galileo | first person to use telescope
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| Newton | Gravity is the force that keeps all objects in orbit
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| Newton's law of universal gravitation | the higher the gravity, the more mass or the closer objects are together
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
seagullq
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