Question

1. why does the equator experience about the same temperatures year - round? (a) it tilts toward the sun and gets much more direct solar energy. (b) it has no prevailing winds. (c) it has no mountains to affect its climate. (d) the suns rays strike the equator at about the same angle all year 15. at the north pole the sun will rise above the horizon on _ and set below the horizon on _. (a) june 22; september 23 (b) september 23; december 22 (c) march 21; september 23 (d) june 22; december 22 16. in the northern hemisphere, this day has the fewest hours of daylight: (a) summer solstice (b) winter solstice (c) vernal equinox (d) autumnal equinox 17. during an equinox: (a) the days and nights are of equal length except at the poles (b) at noon the sun is overhead at the equator (c) the earth is not tilted toward nor away from the sun (d) all of the above 18. during the winter solstice in the northern hemisphere: (a) astronomical winter begins in the northern hemisphere (b) the noon sun is overhead at 23.5°s latitude (c) at middle latitudes in the northern hemisphere, this marks the longest night of the year (d) all of the above 19. where are the days and nights of equal length all year long? (a) at 66.5° (b) nowhere (c) at 23.5° (d) at the equator 20. on which date does the sun first rise at the north pole? (a) december 21 (b) march 21 (c) june 21 (d) september 23

Explanation:

1. The equator has relatively constant temperatures because the sun's rays strike it at about the same angle throughout the year.
2. At the North Pole, the sun rises above the horizon on the vernal equinox (March 21) and sets below the horizon on the autumnal equinox (September 23).
3. In the Northern Hemisphere, the winter solstice has the fewest hours of daylight.
4. During an equinox, days and nights are of equal length except at the poles, at noon the sun is overhead at the equator, and the earth is not tilted toward nor away from the sun.
5. During the winter solstice in the Northern Hemisphere, astronomical winter begins, the noon sun is overhead at 23.5°S latitude, and at middle latitudes in the Northern Hemisphere, it marks the longest night of the year.
6. The equator has days and nights of equal length all - year long.
7. The sun first rises at the North Pole on the vernal equinox (March 21).

Answer:

1. D. The sun's rays strike the equator at about the same angle all year.
2. C. March 21; September 23
3. B. winter solstice
4. D. all of the above
5. D. all of the above
6. D. at the Equator
7. B. March 21