CURRICULUM | SCIENCE | TECHNOLOGY | ENGINEERING | MATH
“Sometimes it is the people no one can imagine anything of, who do the things no one can imagine.” - Alan Turing
LATITUDE AND LONGITUDE
LESSON 3
VIDEO STARTER: SCALE OF LATITUDE LINES
SAME VIDEO FROM DAY 1. DIFFERENT OBJECTIVE. PAY ATTENTION TO TIME ZONES AS WELL AS DISTANCES BETWEEN LATITUDE LINES.
VIDEO STARTER: TIME ZONES
THESE ARE THE NUMBERS AND REASONS FOR OUR WEIRD TIMEZONES.
READING MISSION
In your notebook, you will be answering the following from the reading.
How do Time Zones work?
Why do we have Daylight savings time?
What determines the length of a year?
Why do we have a leap year?
There are a lot of religions in the world. What is a way to say BC or AD in a way that's acceptable to all religions?
FOR YOUR NOTEBOOK:
Lesson 3: Latitude and Longitude 3
The inner workings of longitude and latitude.
1. Timezones - Due to our Earth's rotation, (1 full spin every 23 hours 56 minutes) sunrise and sunset times are completely different all over the world. To make everyone have a relatively normal day, we change the time by an hour every 15 degrees. This way California's sunrise looks a lot like Pennsylvania's sunrise.
Timezone Calculation:
Earth: Rotation = 24 Hours | Degrees = 360 | 360 Degrees / 24 Hours = 15 Degrees Per Hour
We adjust timezone lines so we can keep the states or countries in the same zones. If it's 3:00PM in Philly, it should be 3:00PM in Pittsburgh.
2. Latitude Scaling - Every latitude line 69 miles north or south from the next latitude line. Therefore, 1 degree of latitude = 69 miles.
3. Longitude Scaling - If 1 degree of Latitude is 69 miles, then 1degree of Longitude is 69 miles AT THE EQUATOR. Longitudinal lines join at the north pole and the south pole. As you venture away from the equator, the distance between longitudinal lines decreases.
DO THE MATH: KNOWING THAT EVERY DEGREE IS 69 MILES, WHAT IS THE EARTH'S CIRCUMFERENCE?
Once you figure it out, Google the actual and see if you're close!