1. Exit : Why is a light year called a light year?
125
126
Light Years
Light Years
12/16/2014
12/16/2014
Application:
What measurement unit would be used to measure from your desk to your home?
What measurement could be used to measure from your desk to the next city? To the moon?
What type of unit would we need for distances across space?
Connection: Notes
Exit : Why is a light year called a light year?
Starter:
Describe what the following terms
measure:
Mph, knots, mach, light yr., warp
Practice
Objects
Lengths
Pencil
Book
Desk
Desk to wall
Which units are best to describe the distances of objects to the wall?
What unit would you not use to describe far distances? Why?

2. TOC: Light Years I. Starter
Describe what the following terms
measure:
Mph, knots, mach, light yr., warp

3. 1. Starter
2. Notes
3. Connection
4. Exit
December 16, AGENDA Objective 8.8 D Model and describe how light years are used to measure distances and sizes in the universe by reading and writing while completing notes and a measurement activity.

4. Describe what the following terms measure:
I. Starter
Describe what the following terms
measure:
Mph
Speed showing the miles an object travels in a hour
Knots
Speed a boat travels
Light year
Distance travels in a year
Speed that spacecraft travels
warp
Speed a plane travels when it breaks the sound barrier
Mach

5. Table of Contents Date Lecture/ Activity/ Lab Page
11/ Quiz and Writing
11/ CBA Review
11/ Solar System
11/ Solar System Web
11/ Solar System Writing and Quiz
11/20-12/1 Solar System Web
12/ Planetary Soda Pop Lab
12/ Conditions for Life
12/ Space Mission Notes
12/ Solar System II with Writing
12/ Space Exploration
12/ Space Mission Poster
12/ Early Astronomers
12/ Light Years

6. II. Practice
Create a data table for the following data. With your table partner, measure the distance from each of the following.
Using a pencil, 12-in ruler, and a meter stick . Be sure to label the units involved.
Length of a book
Length of pencil
3. Length of desk
4. Length of your desk to a wall.

7. III. Application
Which units are best to describe the distances of objects to the teacher’s desk?
Which unit was not appropriate for describing the farthest distance? Why?
What measurement unit would be used to measure from the teacher’s desk to your home?
What measurement could be used to measure from the teacher’s desk to the next city? To the moon?
What type of unit would we need for distances across space?

8. Exit : Why is a light year called a light year?
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178
Light Years
Light Years
2/18/2014
2/18/2014
Application:
What measurement unit would be used to measure from your desk to your home?
What measurement could be used to measure from your desk to the next city? To the moon?
What type of unit would we need for distances across space?
Connection: Notes
Exit : Why is a light year called a light year?
Starter:
Describe what the following terms
measure:
Mph, knots, mach, light yr., warp
Practice
Objects
Lengths
Pencil
Book
Desk
Desk to wall
Which units are best to describe the distances of objects to the wall?
What unit would you not use to describe far distances? Why?

9. IV. Connection
Notes go here!!!

10. Light Year
The term light year is confusing for many people because it actually measures distance instead of time. One light year is the distance that light can travel in one year. Light travels at 186,000 miles per second; therefore, a light year is 6,000,000,000,000 miles

11. Light Year Age
Using a light year as a distance measurement helps determine age. The light from a star that is 1 million light years away has traveled at the speed of light to reach us. The light we are seeing was created 1 million years ago. So the star we are seeing is really how the star looked a million years ago, not how it looks today.

12. Distance From Earth
the Moon from the Earth? 1.3 light seconds. the Earth from the Sun? 500 light seconds or 8 light minutes. The nearest star? Alpha Centauri at 4.3 light years. the nearest galaxy? The large spiral Andromeda galaxy is about 2.7 million light years away.

13. How Long does it take to fly to Alpha Centauri?
Speed of light : 186,000 miles per second
Nearest star after the Sun: Alpha Centauri at 4.3 light years.
One light year= 6,000,000,000 (6 trillion miles)
Method of travel: X-15 (travels at one mile per second)
11.5 days to travel one million miles.
31.7 years to travel one billion miles.
760,000 years to reach Alpha Centauri.

14. Exit : Why is a light year called a light year?
125
126
Light Years
Light Years
12/16/2014
12/16/2014
Application:
What measurement unit would be used to measure from your desk to your home?
What measurement could be used to measure from your desk to the next city? To the moon?
What type of unit would we need for distances across space?
Connection: Notes
Exit : Why is a light year called a light year?
Starter:
Describe what the following terms
measure:
Mph, knots, mach, light yr., warp
Practice
Objects
Lengths
Pencil
Book
Desk
Desk to wall
Which units are best to describe the distances of objects to the wall?
What unit would you not use to describe far distances? Why?