Back to Space Unit

Earth's Moon - Chapter 3-2

pages 113-119

The Earth’s Moon 

· Neil Armstrong1st man to step on moon - 1969

·Buzz Aldrin2nd man to step on moon - 1969

· Lunar module – Eagle explored the moon

· Michael Collins never touched the moon’s surface – orbited the moon in the Columbia


The Moon’s Characteristics   · Diameter is ¼ Earth’s size

· Gravity is Earth’s gravity – Objects weigh much less on the moon

· Scientists left a mirror on the moon to help them calculate the distance from Earth to the moon. They knew how fast light travels, they bounced a beam of light from earth to the moon and timed how long it took to get back

· The moon has many moonquakes. The moon also has a crust, another layer then the core.

· Moon rocks – about 4.6 billion years old – same age as Earth.

· Earth and Moon formed –same time.

· No water· No Atmosphere – Without atmosphere there can be no weather

· Temperatures hot day 100° - cold night -175°



Features of the Moon  · Galileo Galilei – 1st person to view the moon through a telescope (1609)

· Highlandsmountain ranges on the moon

· Maria – dark lowland plains – named after mare, the Latin word for seas because from Earth they looked like water

· Craters – hundreds of craters – the largest is called Copernicus – Most craters are in the highlands. Formed by many meteorites crashing into Moon’s surface – some are the result of volcanic activity.

· Rilles – long valleys on the moon – Hadley Rille is one of the longest. Since there was no water on the moon, they must have formed from volcanic activity or moonquakes

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