Page 185 - Science Course 3 (Book 2)

Solar and Lunar Eclipse Mo12-L4a: What is a Solar Eclipse?
Lesson 4

Let’s Begin

In this topic, you will learn the following Shadows—the Umbra and the Penumbra
lessons:
Mo.12–L4a: What is a Solar Eclipse? Light from the Sun and other wide sources cast
shadows with two distinct parts.
Mo.12–L4b: What is a Lunar Eclipse?

Penumbra

Umbra
Mo12–L4a What is a Solar Eclipse?
Light Source Ball
KEY CONCEPTS:
1. What is a solar eclipse?
The umbra is the central, darker part
of a shadow where light is totally blocked.

Vocabulary A-Z The penumbra is the lighter part of a shadow where
light is partially blocked.
Let us learn some vocabulary

umbra Solar Eclipses
the central, darker part of a shadow where light is During the new moon phase, Earth, the Moon, and
totally blocked.
the Sun are lined up and the Moon casts a shadow
on Earth’s surface.
penumbra

the lighter part of a shadow where light is partially
blocked.

solar eclipse

an occurrence during which the Moon’s shadow
appears on earth’s surface.

SOLAR ECLIPSE

UMBRA
PENUMBRA

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