Good Morning TEST DAY Good Morning Can you
- Slides: 54
Good Morning!!! TEST DAY
Good Morning. . Can you answer? • What evidence is there for Earth’s revolution around the Sun? • Describe the shape of Earth’s orbit and explain how Earth’s position relative to the Sun changes as Earth revolves. • Name the solstices and equinoxes and dates on which they occur. • How would the solstices and equinoxes change if the Earth’s orbit were circular instead of elliptical? Explain how a circular orbit would affect seasonal changes.
Good Morning… Can you…. . • Explain the nebular hypothesis • Describe the size and shape of Earth • Describe the compositional and structural layers of Earth’s interior. • Identify the possible source of Earth’s magnetic field. • Summarize Newton’s law of gravitation. • List and describe the four spheres that make up our Earth. • List and explain the evidence for the rotation and revolution of Earth?
Earth’s Rotation & Revolution Part II
Effects of Revolution and Tilt ▫ Effects of Earth’s revolution include the season and variation in the length of days and nights.
• Earth’s tilt also has a profound effect on the seasons, THE DISTANCE FROM THE SUN IS NOT THE REASON WE HAVE SEASONS.
▫ At any given time one hemisphere is pointed away from the Sun, while the other is pointed toward the Sun
Question • How would changing the degree of the tilt effect life on the Earth?
Equinox ▫ There are two days each year, midway between the solstices, when neither hemisphere tilts toward the Sun.
• On these days, daytime and nighttime are nearly equal (not exactly, this varies with your location)
• Vernal equinox-which occurs on or around March 21 st • Autumnal equinox- which occurs on or around September 22
• The Sun is overhead the equator at noon on these dates
• On March 21 st the sun rises above the horizon at the North Pole for the first time in six months, and remains in the sky for the next 6 months; this starts 6 months of darkness for the South Pole
Summer Solstice ▫ The first day of summer in the Northern Hemisphere ▫ Occurs on or about June 21 st
▫ Has the longest daylight period, because the sun’s path across the sky is longer and higher than at any other time of the year. ▫ At this point the daily increase of the Sun rising in the sky stops.
▫ This is when the Northern Hemisphere is at its maximum tilt toward the Sun. ▫ This is when the Southern Hemisphere is at its maximum tilt away from the Sun.
▫ The Sun is directly overhead at the latitude 23. 5°N, also known as the Tropic of Cancer
• On this day everything above 66. 5° N latitude (The Arctic Circle) receives 24 hours of daylight, and everything south of 66. 5°S (the Antarctic Circle) receives 24 hours of darkness
Winter Solstice ▫ The first day of winter for the Northern Hemisphere ▫ Occurs on or about December 21 st
▫ Has the shortest daylight period, because the sun’s path across the sky is shorter and lower than at any other time of the year. ▫ At this point the daily decrease of the Sun rising in the sky stops.
▫ This is when the Northern Hemisphere is at its maximum tilt away from the Sun. ▫ This is when the Southern Hemisphere is at its maximum tilt toward the Sun.
▫ The Sun is directly overhead at the latitude 23. 5°S, also known as the Tropic of Capricorn
• On this day everything above 66. 5° N latitude (The Arctic Circle) receives 24 hours of darkness, and everything south of 66. 5°S (the Antarctic Circle) receives 24 hours of daylight
Effects of Rotation ▫ Foucault’s Pendulum
Quick Video • Foucault’s Pendulum
• Coriolis effect-ocean and wind currents do not move in a straight path, they are deflected to the right in the Northern Hemisphere
Coriolis
The Daily Change from Day to Night � The Sun rises in the east and sets in the west � only ½ the Earth receives sunlight at any given time, if the Earth didn’t rotate the side facing the Sun would receive constant daylight
Measuring Time • Each day the Sun rises on the eastern horizon, seems to move in an arc across the sky, and sets below the western horizon. Solar noon occurs when the Sun is at the highest position on this arc
▫ Because of Earth’s rotation solar noon does not occur at the same time everywhere ▫ It moves westward at a rate of about 15° each hour, or 1° every four minutes
Example: • New York City, located at longitude 74° W, and Philadelphia which is near 75° longitude. Because of the 1° difference in longitude, solar noon occurs in New York City about four minutes before it occurs in Philadelphia
Standard Time Zones ▫ There are 24 worldwide standard time zones, each are 15° longitude wide ▫ The basis for the time zones is the rate at which the Sun appears to move across the sky
▫ Each time zone line is called a time meridian, all areas within a time zone keep the same clock time; clock time is the average solar time at that zone’s time meridian
• The starting point for the standard time zones is an arbitrary longitude line called the prime meridian, which passes through Greenwich, England.
The Prime Meridian in Greenwich, England National Maritime Museum
▫ Travelers moving westward from Greenwich move their clocks back to earlier times and vice versa ▫ Time zone lines are seldom perfectly straight lines. What could be the reason for this?
International Date Line ▫ Travelers going completely around the world gain or lose time at each time zone until they have gained or lost an entire day
• An imaginary line called the International Date Line represents the longitude at which the date changes.
▫ It is goes through the Pacific Ocean, if you are traveling westward the date is one day later and vice versa ▫ For much of each day, the U. S. is one day behind Asia
For the rest of class • Put your Unit 4 packet together and STAPLE it • Make 3 -4 test Questions PER PAGE
- Hello friend! i am glad to see you!
- Como te llamas in spanish
- Day 1 day 2 day 3 day 4
- If you think you can you can poem
- Good morning class!
- Teacher
- Introduction speech good morning
- You are good you are good when theres nothing good in me
- Useful phrases for business emails
- Receptionist good evening
- "tao lin"
- Hello good morning madam
- Good morning
- Buenas tardes good afternoon
- Day 1 day 2 day 817
- If you can imagine it you can achieve it
- If you cannot measure it, you cannot improve it
- If you can’t measure it, you can’t manage it
- If you cannot measure it you cannot manage it
- Vertikale bilanzkennzahlen
- Greetings
- You are good and your love endures forever
- Nobody loves me poem
- Good morning campers who can make me hard
- Later in the morning
- Good morning ladies and gents
- Good charlotte the young and the hopeless
- Good morning good lookin
- Morning students
- Good evening ladies and gentlemen. we are now
- Good morning to you song
- Hope you all fine
- Goodmorning students
- Good morning student how are you
- Good morning students how are you today
- Teacher good morning everybody
- Good evening ladies and gentlemen. we are now
- Good morning hasta que hora
- A nice to meet you b
- Eko supriyanto hadi
- Good morning everyone. as you know this careers
- Dialogue in a clothes shop
- Good morning hello and how are you
- You can tell harris about it just ____(easily) as i can.
- You can tell harris about it just ____(easily) as i can
- Comparative and superlative for less
- Through you blind eyes are open
- Do all the good you can
- Money can buy a clock but not time
- Good thoughts good deeds good words
- You can't turn right here
- So you think you can argue
- You can always substantially change how intelligent you are
- Standardasation
- Alan and susie an argument