Earth Science 1 In a time long ago…………. A place very far away……. We will venture past our solar system…………. Beyond our galaxy……. We will reach to the outer limits of the universe……. To the Twilight Zone…………
Where Does the Energy for the Planet Come From? • The Sun! Average size star Energy from sun to Earth Sun Plants use this energy to make food 8 minutes
Core: Hydrogen atoms join together to make Helium Energy we see Hey! Honored gift of sun The fusion of hydrogen
Crab Nebula- Supernova
Simulated Black Hole outside of Milky Way Galaxy Pull of gravity is so strong, not even light can escape.
Collections of stars: Galaxies: (Stars that travel together) Tiny points of light in the night sky= Stars We rotate so the stars really look like this http://news.nationalgeographic.com/news/2014/03/140309-yosemite-national-park-time-lapse-video/?utm_source=NatGeocom&utm_medium=Email&utm_content=pom_20140316&utm_campaign=Content
All of the planets that revolve around the sun are part of our Solar System. My Very Educated Mother Just Served Us Nachos Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune What happened to Pluto? Pluto still revolves around the sun. Pluto is considered a dwarf planet.
There are other things in the solar system: Comets, Meteors and Asteroids Asteroid belt is between Mars and Jupiter Comets can orbit sun kept there by gravitational pull. Gravity Gravity Gravity
Meteor Crater in Arizona Barringer meteorite fell 50,000 years ago http://www.meteorcrater.com/
Earth turns on its axis Tilted: This turning is called Rotation This rotation causes the sun to appear as if it rises in the east and sets in the west. Polaris North West East South 1 Complete Rotation = 24 hours = 1 Day
Revolution is when the Earth moves around the sun in its orbit. Earth How long does it take to go once around the sun? 1 Complete Revolution = 365.25 days = 1 Year
Lets talk about the seasons. Seasons are caused by Earth’s tilt. Causing uneven heating of Earths surface. How did the Earth get tilted? A meteor hit Earth causing the tilt and then debris (molten rock) from Earth’s surface formed the moon.
Person is tilted away from sun Person is tilted toward sun
Northern Hemisphere points away from the sun: Winter The North Pole receives less heat energy from the sun. 24 hours of darkness
December: Winter north of the equator, summer south of the equator. The Sun Shines directly on the Southern Hemisphere and indirectly on the Northern Hemisphere.
North Pole South Pole
Northern Hemisphere points toward the sun: Summer The North Pole receives more heat energy from the sun. 24 hours of light
June: Summer north of the equator, winter south of the equator. The Sun Shines directly on the Northern Hemisphere and indirectly on the Southern Hemisphere.
Solstice Sol-sun Sistere-to stand still Position A- Summer Solstice: June 21st in Northern Hemisphere- Summer Position B & D: Autumnal and Vernal Equinox. Equal day and night. Fall & Spring Equinox- equal night Position C- Winter Solstice: December 21st in Northern Hemisphere- Winter
March: Spring north of the equator, fall south of the equator. The Sun Shines equally on the Southern and Northern Hemisphere.
September: Fall north of the equator, spring south of the equator. The Sun Shines equally on the Southern and Northern Hemisphere.
Using the diagram from question 1 answer the following question. Which diagram best represents the tilt of Earth’s axis in June?
Answer questions 3-5 based on the map of Earth found on page 3. Why is there more daylight shown south of the equator? Identify which season is beginning in the Northern Hemisphere.
North Pole South Pole
View of equinox from above North Pole. • 12 Hours day/night • Equal day/night
Your latitude is equal to the angle of Polaris Latitude-location north or south of equator Imaginary lines drawn like this AKA: Parallels Equator= 0° North Pole= 90°N South Pole= 90°S
Change in Latitude can cause: • Change in amount of daylight • Change in temperature
Longitude- location east or west of prime meridian Imaginary lines drawn like this AKA: Meridians Prime Meridian= 0° International Date line= roughly 180°
Changes in time zones go along with the lines of longitude. So sun rise/set can happen at the same time all over the world.