Thursday, April 22nd

AgendaCollect Homework: “Deep Space” worksheetFinish Section 18.3: The Solar System

The MoonMovie: “A Spin Around the Solar System:

Moon Dance”In-Class Assignments:

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

Homework: Solar System Project

The MoonOur 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 ofthe 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 EclipseDuring 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 EclipseWhen 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 RareBecause 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 ProjectAs 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 30th before the chapter 18 test.