Thursday, April 22 nd Agenda  Collect Homework: “Deep Space” worksheet  Finish Section 18.3: The Solar System The Moon  Movie: “A Spin Around the Solar.

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Presentation transcript:

Thursday, April 22 nd Agenda  Collect Homework: “Deep Space” worksheet  Finish Section 18.3: The Solar System The Moon  Movie: “A Spin Around the Solar System: Moon Dance”  In-Class Assignments: Section 18.3 review, pg. 600: #1-7, 9 Study Guide: The Solar System  Homework: Solar System Project

The Moon  Our moon is probably the most familiar object in the night sky.  Like planets, it reflects light from the sun.  The surface of the moon is covered with craters, mostly caused by asteroids.  Larger dark patches on the surface are seas of lava that flowed out of the moon’s interior.

The Moon has Phases Because it Orbits Earth  As the moon orbits Earth, it appears to have different shapes.  Phases: the different apparent shapes of the moon or a planet due to the relative positions of the sun, Earth, and the moon or planet.  At any given time, the sun illuminates only half of the moon’s surface, just as at any time it is daytime on one half of the Earth and nighttime on the other half.

Phases of the Moon

The Moon has Phases Because it Orbits Earth  When the side of the moon that is lit is facing you, it is called a full moon.  When the side of the moon that is lit is not facing you, it is called a new moon.

The Moon has Phases Because it Orbits Earth  Between the full and new moons, there are other phases: Crescent moon: only a small portion of the lit side of the moon is visible. Quarter moon: half of the lit side of the moon is visible. Gibbous moon: more than half of the lit side of the moon is visible.

Eclipses  Eclipses happen when Earth, the sun, and the moon are in a straight line.  An eclipse occurs when one object moves into the shadow cast by another object.

Solar Eclipse  During a new moon, the moon may cast a shadow onto Earth.  Observers within that shadow on Earth see the sky turn dark as the moon blocks out the sun.

Lunar Eclipse  When the moon is full, it may pass into the shadow of Earth.  Observers on Earth see the full moon become temporarily dark as it passes through Earth’s shadow.

Eclipses are Rare  Because the moon’s orbit is slightly tilted compared with Earth’s orbit around the sun, the moon is usually slightly above or below the line between Earth and the sun.  For this reason, eclipses are relatively rare. Solar Eclipse Lunar Eclipse

Movie: “A Spin Around the Solar System: Moon Dance”  Again, you do not have to take notes…

In-Class Assignments:  Section 18.3 review, pg. 600: #1-7, 9  Study Guide: The Solar System

Solar System Project  As part of your grade for this chapter, you will complete a solar system project.  You will choose which type of project you want to do.  We will go to the computer lab on Monday for ½ class period to conduct research.  You will have another ½ day of class time on Wednesday to work on your project.  All projects will be presented to the class on Friday, April 30 th before the chapter 18 test.