Recap of Earth-Moon Comparison. Earth 6400 kilometer radius 23 degree axis tilt (seasons!) Surface...

Recap of Earth-Moon Comparison

http://solarsystem.nasa.gov/multimedia/gallery/Earth_Moon.jpg

Earth

6400 kilometer radius23 degree axis tilt

(seasons!)Surface temps –73 to 48 C

(-100 to 120F)Thick atmosphere, mild

greenhouse effect Liquid water – lots! - at

surface

1738 kilometer radius7 degree axis tiltSurface temps - 107 C to

–153 C (224 F to –243 F)

No atmosphere

No liquid water

Moon

Earth

Active volcanoes - chains

Earthquakes - chainsMountain chainsActive magnetic fieldFew craters

Geologically Active!

Moon

NO active volcanoesFew moonquakesNO mountain chainsNO active magnetic

fieldBuckets of craters

Geologically Inactive!

Phases of the Moon!

• Revolve

• Orbit

• Rotate

• Axis

Earth-Moon Vocabulary

Moon Vocabulary• Waxing- To show a progressively larger illuminated area

from new moon to full moon. Lighted side is getting BIGGER and on the RIGHT!

• Waning- To show a progressively smaller illuminated area from full moon to new moon. Lighted side is getting SMALLER and on the LEFT!

• Gibbous- More than half but less than fully illuminated. Means “hump”.

• Crescent- The figure of the moon as it appears in its first or last quarter, with concave and convex edges terminating in points. Means “curved”.

Eclipse- Occurs when one object passes through the shadow of another. Means

“outshine or surpass”.

• Lunar Eclipse- The full moon passes through Earth’s shadow and appears eclipsed, or shaded. It may also look red. A total Lunar Eclipse lasts more than 2 hours. The Earth is between the Moon and the Sun.

• Solar Eclipse- Earth passes through the shadow of the moon, and the sun appears hidden behind the moon. A total Solar Eclipse lasts no more than 7.5 minutes. The moon is between the Earth and the Sun.

Eclipses

• Only 7 eclipses occur in a single year.–2 Lunar–5 Solar

November 1, 2004Waning Gibbous

November 2, 2004 Waning Gibbous

November 4, 2004Third or Last Quarter

November 5, 2004 Third or Last Quarter

November 6, 2004Waning Crescent

November 7, 2004 Waning Crescent

November 12, 2004New Moon

November 13, 2004 Waxing Crescent

November 18, 2004First Quarter

November 19, 2004Waxing Gibbous

November 20, 2004 Waxing Gibbous

November 27, 2004Full Moon

Recap of Earth-Moon Comparison. Earth 6400 kilometer radius 23 degree axis tilt (seasons!) Surface...

Documents

Transcript of Recap of Earth-Moon Comparison. Earth 6400 kilometer radius 23 degree axis tilt (seasons!) Surface...