Page 24 - Geography for Secondary Schools Student’s Book Form One

Geography for Secondary Schools
Student’s Book Form One

Lunar eclipse
When light from the Sun is obstructed, a circular shadow is observable. For example,
during the eclipse of the moon, the shadow of the Earth on the moon appears spherical
(Figure 2.8).
Earth
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Moon

sun

Figure 2.8: Lunar eclipse

Earth’s curved horizon

The Earth appears to have a curved horizon when viewed from a high cliff, a plane or
a high building. The earth’s curved horizon widens as the observer’s altitude increases
until it becomes circular (Figure 2.9).

The sky

A curved
horizon

The earth

Figure 2.9: The earth’s curved horizon

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