1 Earth Moon Sun Foldable Make a foldable with 6 flaps (5 cuts) All 24 bold words/phrases = vocab terms there are 2 pics and 1 paragraph I want you to.

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Presentation transcript:

1 Earth Moon Sun Foldable Make a foldable with 6 flaps (5 cuts) All 24 bold words/phrases = vocab terms there are 2 pics and 1 paragraph I want you to write on the wings Write as much definition on the inside as you need to help you understand each word and be able to explain it to someone else. 1

The Phases of the Moon (1) The Moon orbits Earth in a sidereal period of days. (to reach a fixed position in space, like if the earth wasnt moving) days EarthMoon Fixed direction in space

The Phases of the Moon (2) The Moon’s synodic period (to reach the same position relative to the sun) is days (~ 1 month). Fixed direction in space Earth Moon Earth orbits around Sun => Direction toward Sun changes! days

The Phases of the Moon (3) From Earth, we see different portions of the Moon’s surface lit by the sun, causing the phases of the Moon. Draw picson wings watch?v=2aFGNGEcDO k

The Phases of the Moon (4) Waxing = Getting Bigger Waning = Going Away Crescent = Croissant shaped Gibbous = Swollen on one side New = between sun and earth (so cant see it) Full = on other side of earth (so we can see the lit side) Order of Phases = New --> Wax --> Full --> Wane

The Tides watch?v=l37ofe9haMU&f eature=related Cause of Tides: (write this on the wings) The moon’s gravity distorts the earth and the water (mostly the water) causing it to elongate. This causes 2 high and 2 low tides per day. com/watch?v=R1lY KYlnFoY

Spring and Neap Tides The Sun is also producing tidal effects, about half as strong as the Moon. Near Full and New Moon, those two effects add up to cause spring tides. (Higher tides) Near first and third quarter, the two effects work at a right angle, causing neap tides. (lower tides) Spring tides Neap tides

Lunar Eclipses Earth’s shadow consists of a zone of partial shadow, the Penumbra, and a zone of full shadow, the Umbra. If the moon passes through Earth’s full shadow (Umbra), we see a lunar eclipse. If the entire surface of the moon enters the Umbra, the lunar eclipse is total.

A Total Lunar Eclipse (1)

A Total Lunar Eclipse (2) A total lunar eclipse can last up to 1 hour and 40 min. During a total eclipse, the moon has a faint, red glow, reflecting sun light scattered in Earth’s atmosphere.

Solar Eclipses The sun appears approx. as large in the sky (same angular diameter ~ ) as the moon. → When the moon passes in front of the sun, the moon can cover the sun completely, causing a total solar eclipse.

Total Solar Eclipse Prominences Chromosphere and Corona Corona = Plasma atmosphere of the sun best seen during eclipses Chromosphere = Part of the Sun’s Atmosphere you see (cooler plasma) Prominences = Parts of the atmosphere that stick out.

Earth and Moon’s Orbits Are Slightly Elliptical Sun Earth Moon (Eccentricities greatly exaggerated!) Perihelion = position closest to the sun Aphelion = position furthest away from the sun Perigee = position closest to Earth Apogee = position furthest away from Earth

Annular Solar Eclipses The angular sizes of the moon and the sun vary, depending on their distance from Earth. When Earth is near perihelion, and the moon is near apogee, we see an annular solar eclipse. Perigee Apogee Perihelion Aphelion

Annular Solar Eclipses (2) Almost total, annular eclipse of May 30, 1984

Conditions for Eclipses (1) A solar eclipse can only occur if the moon passes a node near new moon.(because the moon is in the middle) The moon’s orbit is inclined against the ecliptic by ~ 5 0. A lunar eclipse can only occur if the moon passes a node near full moon. (because the earth is in the middle)

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