Warm-Up 4/30Warm-Up 4/30Throwback ThursdayThrowback Thursday

• How does each rock form?– Sedimentary– Metamorphic– Igneous

Get out your Load the Shuttle questions if you did not turn in yesterday.

Celestial Objects in our Celestial Objects in our Solar SystemSolar System

Celestial- positioned in or relating to the sky, or outer space as observed in

astronomy

Essential VocabularyEssential VocabularyRotationRotation – the time it takes to spin on – the time it takes to spin on its axis its axis

This makes one DAYThis makes one DAY

RevolutionRevolution – the time it takes to orbit – the time it takes to orbit the sun once the sun once

This makes one YEARThis makes one YEARhttp://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?chapter_no=visualization

The Inner PlanetsThe Inner Planets

• Mercury, Venus, Earth and Mars

• Known as terrestrial planets because they are made of rock

The Outer PlanetsThe Outer Planets

Jupiter, Saturn, Uranus, and Neptune

Gas Giants – composed mostly of Hydrogen and Helium

The SunThe SunA ball of glowing gas!A ball of glowing gas!

Largest thing in our Largest thing in our solar systemsolar system– 99.8% of the mass 99.8% of the mass

of the solar system of the solar system

The MoonThe Moon

Our moon is named Our moon is named LunaLuna

The moon is a natural The moon is a natural satellite. satellite. – A satellite is anything that A satellite is anything that

orbits something else.orbits something else.

Galilean MoonsGalilean Moons The largest of the The largest of the

63 moons of Jupiter63 moons of Jupiter

Discovered by Discovered by Galileo Galilei on Galileo Galilei on Jan. 7, 1610 Jan. 7, 1610

Galilean MoonsGalilean Moons

Among the most massive rocky objects in Among the most massive rocky objects in the Solar System, with a radius larger than the Solar System, with a radius larger than

Mercury or any of the dwarf planets.Mercury or any of the dwarf planets.

Galilean MoonsGalilean MoonsIo the most geologically active object in the Solar the most geologically active object in the Solar

System System

Europa has a layer of icehas a layer of ice

Ganymede largest natural satellite in the Solar largest natural satellite in the Solar System and has a salt water ocean and oxygen System and has a salt water ocean and oxygen in it’s atmosphere. Larger than Mercury.in it’s atmosphere. Larger than Mercury.

Callisto may have possibly a subsurface ocean of liquid may have possibly a subsurface ocean of liquid water water

MeteoroidsMeteoroids

Meteoroids are rocky Meteoroids are rocky fragments of comets, fragments of comets, planets, moons, or planets, moons, or asteroids. asteroids.

Travel through space Travel through space without an orbit.without an orbit.

MeteorsMeteors

Meteors that have Meteors that have entered an entered an atmosphereatmosphere

Friction with the Friction with the molecules in the molecules in the atmosphere cause it atmosphere cause it to burnto burn

Commonly called Commonly called “shooting stars”“shooting stars”

MeteoritesMeteorites

Any part of a meteoroid Any part of a meteoroid that survives passage that survives passage through the atmosphere through the atmosphere andand lands on the surface lands on the surface a planet or moon. a planet or moon.

Largest meteorite found on Earth

Hoba, Namibia

CometsComets

Mixture of ices (both water and Mixture of ices (both water and frozen gases) dust, and rocks frozen gases) dust, and rocks

Have an elliptical orbit around the Have an elliptical orbit around the sunsun

AsteroidsAsteroids

Left over materials Left over materials from the formation of from the formation of the Solar System the Solar System

Composed of rock or Composed of rock or metalmetal

Smaller than a planet Smaller than a planet but larger than a but larger than a meteor meteor

Asteroid BeltAsteroid Belt

Most asteroids Most asteroids are located in are located in the asteroid the asteroid belt between belt between Mars and Mars and JupiterJupiter

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Asteroids, Comets, and MeteorsAsteroids, Comets, and Meteors