Bell Ringer: EQ. How was the Earth Formed? Please open your textbook to p.624. Silent Read through p.629 and complete the guided worksheet in your blue tubs. Be ready to discuss and answer my questions!!!

Home, Sweet, Home What do you really know about the Earth and what it provides you? It is a ball of stone and metal covered with water, rocks, and dirt. It has a fluid core of iron. 70% of it is covered with water. It has an atmosphere of 80% N , 20% O, and small amounts of argon, CO2, and water vapor.

The Earth is a unique home The Earth is a unique home. What do we already know about its role in our solar system?

Rotating!

Earth’s History: 1) The effects of gravity and heat created the shape and structure of the Earth. 2)The Earth is divided into 3 main layers due to composition: ____________ 3) Earth’s Early atmosphere was CO2 and water vapor. As the Earth cooled, the atmosphere changed. 4) Oceans formed by condensing water vapor. 5) The source of oxygen is photosynthesis.

All objects revolve around the Sun. The Solar System All objects revolve around the Sun. 8 planets, 5 dwarf planets.

How does the Earth’s gravity and the moon’s gravity AND the Sun’s gravity, compare to the gravitational force of other planets?

How many days does the Earth take to Revolve How many days does the Earth take to Revolve? How old would you be on other planets? How much would you weigh?

The Sun 10,000,000,000 years 10,832 °F

There are more stars in the universe than there are grains of sand on the Earth.

Solar Nebulas All of the ingredients for planets, moons, and stars are found in clouds in space: NEBULAS! Nebulas are mixtures of gases, mainly _______&___________ and dust made of heavier elements like carbon and iron. Gravity pulls matter together! In most nebulas, there is a lot of space b/n the particles. (less dense than air!) Gravitational pull is weak (little mass).

The Earth has a gravitational pull of its own.

The Moon Near Side

What else do we know about the Moon? Gravity Rotation/Revolution Have you heard about the new restaurant on the moon? It has great food, but a lousy atmosphere!

The Moon The moon was once a part of Earth. A large object, pulled by Earth’s gravity, knocked it off. The moon is about ¼ the diameter of the Earth.

Rotation vs. Revolution The Earth rotates on its axis. One rotation happens every 24 hours. This rotation gives us day and night. The Earth revolves around the Sun on its orbit. One revolution happens every 365 ¼ days (one year). Reinact!!!

Moon Facts: It also revolves/rotates! Moon- 27.5 days to revolve around the Earth. Takes about 27 days for the moon to make one full rotation on its axis. That is why…. We only see one side of the moon. The phase of the moon depends on how much of the sunlit side of the moon faces earth.

Phases Phases are caused by the revolution of the moon. Phase we see depends on how much of the lit part we see. It takes the moon 27.32 days to revolve around Earth. That is how many days it takes to cycle through the phases.

What is today’s moon phase? http://www.calendar- 365.com/moon/current-moon- phase.html Why? Draw how this happens!

Phases of the Moon

The Moon Phases Poem The Moon is a sphere, big and white It loves to reflect the sun’s bright light. It goes on a journey every 28th day Around the Earth, hide and seek it will play. In the beginning, it is new Out of sight from me and you! Then it waxes in white light As it grows on its right. Waxing, Crescent, Quarter, then gibbous, too. When it’s full, the phases are halfway through! Now it shines more to the left and starts to wane As it fades away in its orbit lane. Waning, gibbous, quarter, then crescent, too. It’s completed its orbit and back to new! The Moon Phases Poem

Which person do you most agree with? Why? Five friends noticed they could see better at night when there was a full Moon. They wondered where the moonlight came from. This is what they said: Curtis: “The Moon reflects the light from the Earth.” Clarence: “The Moon gets its light from distant stars.” Chet: “The light from the Sun bounces off the Moon.” Deirdre: “There is light inside of the Moon that makes it shine.” Which person do you most agree with? Why?

Phases of the Moon First Quarter Waxing Gibbous Waxing Crescent Phases of the Moon Rap First Quarter Waxing Gibbous Waxing Crescent Full Moon New Moon Waning Gibbous Waning Crescent Last Quarter

Eclipses lunar eclipse -when Earth is between the moon and sun. During a full moon. solar eclipse-when the moon gets between the Earth and the sun. (During a new moon) Demo. http://www.valdosta.edu/~cbarnbau/astro_demos/frameset_moon.html

Eclipses A total eclipse happens when the moon or Earth blocks all of the light from the sun. Umbra- darkest part of the shadow. Penumbra-largest part of shadow.

Why don’t we have an eclipse every month?

Tides Tides caused by gravity of Moon and Sun Spring tide happens at full and new moon. Earth, Moon, Sun lined up-higher highs and lower low tides Neap tide happens at first and third quarter-Earth, Moon, Sun at right angles: tidal range is lower

Spring Tide and Neap Tide

Model how the moon orbits the Earth. http://solarsystem.nasa.gov/news/whatsup-view.cfm?WUID=42 Model how the moon orbits the Earth. And how the Earth orbits the Sun at the same time! M E S

Rotating! How many days does the Earth take to Revolve? How old would you be on other planets?