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"Solar and Lunar Eclipses" Universe PPT Courseware 2
We know some characteristics of the solar eclipse:
(1) The sun is blocked by an object;
(2) The light-blocking object is round or spherical;
(3) The object blocking the light is moving;
(4) The object blocking the light appears to be about the same size as the sun;
(5) The earth, the light-blocking object and the sun are almost in a straight line.
Solar eclipse: When the moon moves between the sun and the earth, if the three are exactly in a straight line, the moon will block the sun's light from the earth. People in the shadow of the earth can only see part of the sun. Or none can be seen, so a solar eclipse occurs.
Solar Eclipse: Sun-Moon-Earth
1. On May 28, 585 BC, when the soldiers of the Mede Kingdom and the Lydian Kingdom in the Mesopotamia were fighting, it suddenly became dark, and the day suddenly turned into night. The two warring parties were horrified, thinking that "God" was to blame, so they immediately ceased fighting and made peace. In fact, this is not something "God" blames, but an ordinary astronomical phenomenon.
(1) This astronomical phenomenon is ( )
A.Solar eclipse B.Lunar eclipse C.Meteor phenomenon D.Aurora phenomenon
(2) The time when this astronomical phenomenon occurs is in the lunar calendar ( )
A. The first day of the lunar month B. The seventh or eighth day of the lunar month C. The fifteenth or sixteenth day D. The twenty-second or twenty-third
(3) When this astronomical phenomenon occurs, the positional relationship between the sun, the earth, and the moon is ( )
A.Sun-Earth-Moon B.Earth-Sun-Moon C.Moon-Sun-Earth D.Earth-Moon-Sun
2. Solar eclipse phenomenon refers to ( )
A. The phenomenon of the sun suddenly disappearing B. The phenomenon of the sun being obscured by the earth
C. The phenomenon of the sun covering the moon D. The phenomenon of the sun being covered by the moon
3. The date when the solar eclipse may occur is ( )
A. It can appear between the 15th and 30th lunar calendar. B. It must be during the new moon.
C. On the first day of each month in the lunar calendar D. Can be on any day
Lunar eclipse: When the earth moves between the sun and the moon, if the three are exactly in a straight line, the earth will block the light from the sun to the moon, so a lunar eclipse occurs.
Lunar eclipse: Sun - Earth - Moon
Discussion: Why are lunar eclipses more likely to occur than solar eclipses? When does a lunar eclipse occur on the lunar calendar?
judge
1. A lunar eclipse is a change in the shape of the moon. ( )
2. A solar eclipse occurs on the first day of every month in the lunar calendar. ( )
3. Solar and lunar eclipses can occur at the same time. ( )
4. What was said in ancient times as “Tengu eats the moon” is actually a lunar eclipse phenomenon. ( )
5. "Tengu eats the moon" is an astronomical phenomenon, not a message of disaster. ( )
I will fill in
1. Solar eclipses can be divided into ( ), ( ), ( ).
2. Solar and lunar eclipses are astronomical phenomena caused by the movement of three celestial bodies ( ), ( ) and ( ).
3. Solar eclipses generally occur in the lunar calendar ( ), and lunar eclipses generally occur in the lunar calendar ( ).
4. The legendary "Tengu eats the moon" is actually ( ) phenomenon.
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