Question

question 5a: describe how the moon changes as it passes through the earth’s shadow.
question 5b: why do most people not notice when the moon enters the penumbra?
question 5c: why can billions of people see a lunar eclipse if the sky is clear?
question 5d: which are more common, solar or lunar eclipses?
reset the simulation by clicking the reset button.
question 5e: record the time when the moon is completely in the umbra (dark shadow). also note the time when the moon begins to leave the umbra. then figure out how long the total eclipse lasted.
question 5f: which lasts longer, a solar eclipse or a lunar eclipse?

Explanation:

Question 5a:

As the Moon passes through the Earth's shadow, it first enters the penumbra (partial - shadow), showing a slight dimming. Then, as it moves into the umbra (full - shadow), it darkens further and may take on a reddish - brown hue due to sunlight refracting through Earth's atmosphere.

Question 5b:

The penumbra causes only a slight dimming of the Moon. This subtle change is often not noticeable to the casual observer, especially if there is light pollution or other distractions.

Question 5c:

A lunar eclipse is visible to anyone on the night - side of the Earth when the sky is clear because the Earth's shadow is large enough to be seen from a wide area, and the light from the eclipsed Moon is reflected towards the Earth's night - side.

Question 5d:

Lunar eclipses are more common. This is because the Earth's shadow is larger than the Moon's shadow, and the alignment requirements for a lunar eclipse are less strict than for a solar eclipse.

Question 5e:

This requires observation during a lunar eclipse simulation or real - life event. Record the start time when the Moon is fully in the umbra and the end time when it starts to leave. Subtract the start time from the end time to get the duration of the total eclipse.

Question 5f:

Lunar eclipses generally last longer. A total solar eclipse can last only a few minutes at a given location, while a total lunar eclipse can last for over an hour due to the relative sizes and distances of the Earth, Moon, and Sun.

Answer:

Question 5a: First enters penumbra with slight dimming, then umbra with darkening and possible reddish - brown color.
Question 5b: Slight dimming in penumbra is often unnoticeable due to light pollution and distractions.
Question 5c: Earth's shadow is large and visible from night - side of Earth when sky is clear.
Question 5d: Lunar eclipses.
Question 5e: Record start and end times of full umbra presence and subtract to find duration.
Question 5f: Lunar eclipses.