Chapter 12 Vocabulary
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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| law of universal gravitation | every object in the universe attracts every other object, depending on their masses and distances from one another
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| solstice | the two days of the year in which the sun's most direct rays reach farthest north or farthest south
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| equinox | the two days of the year when day and night are almost the same length everywhere on earth
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| crescent | the moon phase in which less than half of the moon's sunlit side is visible
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| gibbous | the moon phase in which more than half, but not all, of the moon's sunlit side is visible
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| wax | to grow
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| wane | to shrink
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| lunar eclipse | an event that occurs when Earth passes directly between the sun and the moon, causing the moon to be temporarily "eclipsed" or hidden
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| solar eclipse | an event that occurs when the moon passes directly between the sun and Earth, causing the sun to be temporarily "eclipsed" or hidden
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| tide | the periodic rising and falling of the surface level of ocean water
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| spring tide | a condition of the greatest difference between low and high tides
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| neap tide | a condition of the LEAST difference between low and high tides
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| revolution | the movement of going around an object
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| rotation | the movement of spinning on an axis
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| mass | a measure of how much matter is within an object; greater the mass, the greater the gravity of an object
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| axis | an imaginary line that Earth spins on at a 23.5 degree angle
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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.
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.
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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