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8 Cards in this Set
- Front
- Back
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Causes of seasons on Earth |
The earth is tilted at an angle of 23.5 degrees on its axis, seasons occur due to its tilt on its axis and revolution around the sun |
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Northern v. Southern Hemisphere |
Northern and Southern Hemispheres experience opposite seasons sol |
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Solstice v. Equinox |
Solstice occurs 2 times a year when the sun reaches its highest or lowest point in the sky at noon, it is marked by the longest or shortest day of the year. Equinox occurs 2 times a year when the sun crosses the plane of the equator, marked by equal day and night. |
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Interpreting phases of the moon |
Waxing- an increasing amount of visible light on the moon’s surface; light on the right getting bright Waning- a decreasing amount of visible light on the moon’s surface; Light on the left getting less |
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Predicting the phases of the moon |
Each 1/4 of the cycle takes abt 7 days to occur, to move two phases ahead it takes abt 7 days, |
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Galaxy |
A galaxy is a huge system of millions or billions of stars, galaxies are classified by shape, three types- spiral, elliptical and irregular, we are spiral. |
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HR diagram |
Temp. Increases as you go to the left, brightness increases as you go up. |
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Electromagnetic spectrum |
Radio waves have the lowest frequency and gamma rays have the highest, radio waves have the longest wavelength and gamma rays have the shortest, as the wavelength decreases the frequency increases |
