The Sun-Earth-Moon System
The Sun-Earth-Moon System
Lesson 2
EARTH’S MOON P. 736 – 742
Earth’s Moon • What are the two objects in the picture? – Earth and Moon.
• Where is the sun compared to these 2? – To the right of the picture.
• How do you know? – The half of the earth and the moon on the right hand side is lit up; the left is dark.
Important words • Maria: – The large dark flat areas of the moon.
• Phase: – The portion of the moon reflecting light as seen from earth.
• Waxing phase: – More of the moon’s near side is lit up.
• Waning phase: – Less of the moon’s near side is lit up.
How did the moon form?
Formation of the moon
Formation of the moon
Formation of the moon
The Moon’s Surface
The Moon’s surface • How did the moon’s craters form? – They formed as objects from space (meteors) collided with the earth. They haven’t changed, since the moon has no atmosphere.
• How were the maria produce? – Lava from below the moon’s crust flowed out and covered parts of the moon’s surface.
The Moon’s surface
The Moon’s motion • The moon makes 1 revolution of the earth every 27.3 days (28 days). • While it revolves around the earth, the moon also rotates about its own axis – this rotation takes.....27.3 days! • What does this mean? – It means we only ever see one half of the moon – the near side of the moon. We NEVER see the far side of the moon.
Phases of the moon • When is the 1st quarter moon visible from earth? – Visible between noon and midnight.
Phases of the moon • When is the 3rd quarter moon visible from earth? – Visible between midnight and noon.
Lesson 2
EARTH’S MOON P. 736 – 742
Earth’s Moon • What are the two objects in the picture? – Earth and Moon.
• Where is the sun compared to these 2? – To the right of the picture.
• How do you know? – The half of the earth and the moon on the right hand side is lit up; the left is dark.
Important words • Maria: – The large dark flat areas of the moon.
• Phase: – The portion of the moon reflecting light as seen from earth.
• Waxing phase: – More of the moon’s near side is lit up.
• Waning phase: – Less of the moon’s near side is lit up.
How did the moon form?
Formation of the moon
Formation of the moon
Formation of the moon
The Moon’s Surface
The Moon’s surface • How did the moon’s craters form? – They formed as objects from space (meteors) collided with the earth. They haven’t changed, since the moon has no atmosphere.
• How were the maria produce? – Lava from below the moon’s crust flowed out and covered parts of the moon’s surface.
The Moon’s surface
The Moon’s motion • The moon makes 1 revolution of the earth every 27.3 days (28 days). • While it revolves around the earth, the moon also rotates about its own axis – this rotation takes.....27.3 days! • What does this mean? – It means we only ever see one half of the moon – the near side of the moon. We NEVER see the far side of the moon.
Phases of the moon • When is the 1st quarter moon visible from earth? – Visible between noon and midnight.
Phases of the moon • When is the 3rd quarter moon visible from earth? – Visible between midnight and noon.
