Topicme0ca4ebfcc1fbbb3_1528449000663_0Topic

Lunar eclipses

Levelme0ca4ebfcc1fbbb3_1528449084556_0Level

Third

Core curriculumme0ca4ebfcc1fbbb3_1528449076687_0Core curriculum

III. Gravity and elements of astronomy. The student:

4) describes the structure of the Solar System and its place in the Galaxy.

Timingme0ca4ebfcc1fbbb3_1528449068082_0Timing

45 minutes

General learning objectivesme0ca4ebfcc1fbbb3_1528449523725_0General learning objectives

Explains what the lunar eclipse is.

Key competencesme0ca4ebfcc1fbbb3_1528449552113_0Key competences

1. Describe the mechanism of the lunar eclipselunar eclipselunar eclipse.

2. Explains a Moon’s colour during the eclipse.

Operational (detailed) goalsme0ca4ebfcc1fbbb3_1528450430307_0Operational (detailed) goals

The student:

- explains what the lunar eclipse is,

- explains a Moon’s colour during the eclipse.

Methodsme0ca4ebfcc1fbbb3_1528449534267_0Methods

1. Discussion.

2. Text analysis.

Forms of workme0ca4ebfcc1fbbb3_1528449514617_0Forms of work

1. Individual work.

2. Group work.

Lesson stages

Introductionme0ca4ebfcc1fbbb3_1528450127855_0Introduction

The students share their experience related to the lunar eclipse.

Have you ever seen the eclipse of the Moon in the nature or maybe have you seen some photos of it? Could you describe what have you seen?

Procedureme0ca4ebfcc1fbbb3_1528446435040_0Procedure

The teacher explains the phenomenon of the lunar eclipselunar eclipselunar eclipse.

A lunar eclipse is very interesting astronomical phenomenon which can be observed with a naked eye.

Lunar eclipse.

lunar eclipselunar eclipselunar eclipse can only occur when:

- the Sun, Earth, and Moon are exactly or very closely aligned,
- only during the phase of the Full Moon.

Definition:

A lunar eclipse is a phenomenon that occurs when the Moon is in the shadowshadowshadow of the Earth.

The shadow of the Earth can be divided into two distinctive parts:
The umbraumbraumbra, the central region of the shadow, where no sunlightsunlightsunlight is reaching, and the penumbrapenumbrapenumbra where the Sun is partially obscured by the Earth.

Depending on the position of the Moon in the Earth shadowshadowshadow region we can observe different stages of the lunar eclipse. A total lunar eclipsetotal lunar eclipsetotal lunar eclipse occurs when the entire Moon is in the umbraumbraumbra. There is also possible a partial lunar eclipse when a part of the Moon lies in the umbra region and the rest of it in the penumbrapenumbrapenumbra. A penumbral lunar eclipsepenumbral lunar eclipsepenumbral lunar eclipse occurs when the Moon travels through the penumbra. Usually the partial penumbral eclipses are observed. The total penumbral eclipse is when the Moon is totally immersed in the penumbrapenumbrapenumbra.

[Interactive graphics]

The lunar eclipselunar eclipselunar eclipse occurs not during every Full Moon phase taking place about every 29.5 days. The lunar orbit is tilted with respect to the Earth’s orbit. The phenomenon of the lunar eclipse occurs only when the Sun, Earth, and Moon are on the same line. It is geometrically explained in the pictures below.

Task 1

Look at both pictures below. Analyse them and describe in English the presented situations.

[Illustration 1]

[Illustration 2]

During the lunar eclipse when the Moon is in the region of the Earth’s shadow its face is still visible.
When the Moon enters the penumbra, its face darkens first, and then it is gradually obscured by the Earth until it is entirely in the umbra. Then the Moon's face takes on a reddish colour. This is because the sunlight passing through the Earth's atmosphere is refracted and scattered. The refraction of light is caused by the heterogeneity of the Earth's atmosphere - the closer to the Earth's surface, the denser the atmosphere becomes. The blue part of the visible light spectrum scatters more strongly than the red part - that is why the sky takes on the blue colour. The light leaving the Earth's atmosphere is red and illuminates the Moon in the umbra, giving it such a colour.
me0ca4ebfcc1fbbb3_1527752263647_0During the lunar eclipse when the Moon is in the region of the Earth’s shadow its face is still visible.
When the Moon enters the penumbra, its face darkens first, and then it is gradually obscured by the Earth until it is entirely in the umbra. Then the Moon's face takes on a reddish colour. This is because the sunlight passing through the Earth's atmosphere is refracted and scattered. The refraction of light is caused by the heterogeneity of the Earth's atmosphere - the closer to the Earth's surface, the denser the atmosphere becomes. The blue part of the visible light spectrum scatters more strongly than the red part - that is why the sky takes on the blue colour. The light leaving the Earth's atmosphere is red and illuminates the Moon in the umbra, giving it such a colour.

[Illustration 3]

[Illustration 4]

Lesson summaryme0ca4ebfcc1fbbb3_1528450119332_0Lesson summary

A lunar eclipse is a phenomenon that occurs when the Moon is in the shadow of the Earth. A lunar eclipse can only occur when the Sun, Earth, and Moon are exactly or very closely aligned and only during the phase of the Full Moon.me0ca4ebfcc1fbbb3_1527752256679_0A lunar eclipse is a phenomenon that occurs when the Moon is in the shadow of the Earth. A lunar eclipse can only occur when the Sun, Earth, and Moon are exactly or very closely aligned and only during the phase of the Full Moon.

Selected words and expressions used in the lesson plan

lunar eclipselunar eclipselunar eclipse

umbraumbraumbra

penumbrapenumbrapenumbra

penumbral lunar eclipsepenumbral lunar eclipsepenumbral lunar eclipse

total lunar eclipsetotal lunar eclipsetotal lunar eclipse

sunlightsunlightsunlight

shadowshadowshadow

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lunar eclipse1
lunar eclipse

zaćmienie księżyca

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wymowa w języku angielskim: lunar eclipse
shadow1
shadow

cień

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umbra1
umbra

cień całkowity

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wymowa w języku angielskim: umbra
sunlight1
sunlight

światło słoneczne

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wymowa w języku angielskim: sunlight
penumbra1
penumbra

półcień

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wymowa w języku angielskim: penumbra
total lunar eclipse1
total lunar eclipse

zaćmienie całkowite

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wymowa w języku angielskim: total lunar eclipse
penumbral lunar eclipse1
penumbral lunar eclipse

zaćmienie półcieniowe

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wymowa w języku angielskim: penumbral lunar eclipse