Lunar phases

Bell work for the week of 9-5-11Tuesday, September the 6th

• Page 19 page 19 page 19• Update your table of contents

• Write the following questions- and answer!

• What causes the moon to appear to change shape?

Lunar Phases

Whitfield

Simulated views of the Moon over one month, demonstrating librations- motion of orbiting bodies

1 minute think….

Does the earth’s shadow cause the moon’s phases?

No! It’s all about the SEM System!

New Moon

• Cannot be seen.

New Moon

Waxing vs. Waning

WAXING

–When the bright part is getting BIGGER

WANING

–When the bright part is getting SMALLER

Gibbous vs. Crescent

GIBBOUS

–When the Moon is MORE than half-lit

CRESCENT

–When the Moon is LESS than half-lit

Waxing Crescent

• A narrow strip of the Moon’s lighted hemisphere is visible from the Earth. Shaped like a crescent. The light is on the right.

• Visible late afternoon and just after sunset in the southwestern sky.

First Quarter

• Half of the lighted hemisphere is visible from the earth. Shaped like a semicircle. The light is on the right.

• Visible afternoon and evening, until it sets about midnight.

Waxing Gibbous

• Three quarters of the lighted hemisphere is visible from the Earth. Shaped like an upended football. The light is on the right.

• Visible in the eastern portion of the sky in the late afternoon. After sunset, the moon moves across the southern part of the sky and sets sometime after midnight.

Full Moon

• The moon’s entire lighted hemisphere is visible from the earth.

• Shaped like a full circle.

• The full moon rises when the sun sets, it up all night, and sets when the sun rises.

Waning Gibbous

• Three quarters of the moon’s lighted hemisphere is visible from the earth. Shaped like an upended football. The light is on the left. In this phase, the moon wanes, or turns away from the earth.

• Rises after sunset (as much as 5 or 6 hours later). Best seen in the southwest sky during the morning after sunrise.

Third Quarter

• Half of the moon’s lighted hemisphere is visible from earth. Shaped like a semicircle. The light is on the left.

• Rises at midnight, sets at noon, much like the waning gibbous moon.

Waning Crescent

• A narrow strip of the moon’s lighted hemisphere is visible from earth. Shaped like a crescent. Light is on the left.

• Can only be seen in the early morning.

Moon’s Phases

• http://www.harcourtschool.com/activity/moon_phases/

• http://www.neok12.com/diagram/Moon-01.htm

Moon’s Phases

• http://www.neok12.com/php/watch.php?v=zX6b5c7f0456765261795b6b&t=Moon

• http://www.neok12.com/php/watch.php?v=zX5c60455063656c6c595c41&t=Moon

Eight Phases of the Moon

FACT

• The sun is ALWAYS shining on 50% of the moon, even if we don’t see it!

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Friday, April the 2nd

• Label page 47 Bell work for the week of 3/29/10

• Page 47

• During what two phases of the moon are the earth, sun, and moon in a line? Write the question and answer

Requirements• Draw sun• Draw earth• Cut out each phase• Glue them in order• Label each of them• Put your name and class period on the back. • You will turn this in on Monday• When you are finished read an AR book