1. When Lunar Eclipse occur?
A. When Sun is between Earth and Moon
B. When Earth is between Sun and Moon
C. When Moon is between Earth and Sun
D. When Earth is between Sun and other celestial bodies
2. When did Lunar Eclipse happen?
A. Half Moon
B. Full Moon
C. Equinox
D. None of the above
3. Select the correct option matching together about Earth shadows:
1. Umbra – darker, central part
2. Penumbra – the outer part
3. Antumbra – partly shaded area beyond the umbra
Correct Options are:
A. Only 1 and 2
B. Only 2 and 3
C. Only 1
D. All 1, 2 and 3
4. What is Solar Eclipse?
A. When moon comes in between Earth and Sun
B. When Earth comes in between Moon and Sun
C. When Sun comes in between Earth and Moon
D. When Sun rays does not reach Earth.
5. When the same pattern of solar eclipse repeats every 18 years 11 days 8 hours are known as:
A. Nodes cycle
B. Saros cycle
C. Saras cycle
D. Payan cycle
ANSWERS:
1. Ans. B
Explanation: A lunar eclipse occurs when Earth crosses between the moon and the sun, which casts a shadow of Earth onto the moon.
2. Ans. B
Explanation: Eclipses of the Moon happen at Full Moon, when the Sun, Earth and Moon are aligned to form an exact or an almost straight line.
3. Ans/ D
Explanation: Shadow of earth is divided into three parts:
Umbra is the innermost and darkest part of the shadow and an observer experiences total eclipse. Penumbra is the region in which only a portion of the light source is blocked by the body. Therefore, an observer experiences partial eclipse. Antumbra is the lighter area of a shadow that appears beyond umbra. An observer experiences annular eclipse.
4. Ans. A
Explanation: When the moon orbits Earth, it moves between the sun and Earth. When this happens, the moon blocks the light of the sun from reaching Earth. During a solar eclipse, the moon casts a shadow onto Earth.
5. Ans. B
Explanation: After one saros cycle of 18 years 11days 8 hours, the pattern of eclipses repeats.
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