What is the main idea of the passage?

A lunar eclipse occurs when the Moon enters Earth’s shadow, whose regions and filtered sunlight shape what observers see. (The passage connects alignment, shadow structure, reddish light, and safe observation.)

Why does the Moon often look red during totality?

Earth’s atmosphere bends some red sunlight into the shadow after scattering much blue light. (The third paragraph traces filtered sunlight through Earth’s atmosphere to the Moon.)

What does “umbra” mean?

the dark central part of Earth’s shadow (The second paragraph directly contrasts the lighter penumbra with the darker umbra.)

Why does a lunar eclipse not occur every month?

The Moon’s orbit is tilted relative to Earth’s path. (The opening paragraph identifies orbital tilt as the reason alignment is not monthly.)

When Earth Hides the Moon: Level 3 Reading Comprehension Questions

A lunar eclipse occurs when Earth moves between the Sun and the full Moon. The Moon passes into Earth's shadow. This alignment does not happen every month because the Moon's orbit is tilted compared with Earth's path around the Sun.

Earth's shadow has a lighter outer region called the penumbra and a darker central region called the umbra. If only part of the Moon enters the umbra, observers see a partial eclipse. If the whole Moon enters it, the eclipse is total.

During totality, the Moon often looks red or copper instead of disappearing. Sunlight passes through Earth's atmosphere before reaching the shadowed Moon. The atmosphere scatters much of the shorter blue light and bends some red light inward. Dust and clouds can change the exact color and darkness.

People on Earth's night side can watch a lunar eclipse without special eye protection. Unlike a solar eclipse, it does not require looking toward the bright Sun. The event makes a large geometry visible: the curved edge of Earth's shadow crosses the Moon while filtered sunlight colors the darkness.

Comprehension questions