1. Which units are best to describe the distances of objects to the wall? What unit would you not use to describe far distances? Why? Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp 2/18/2015 183 184 2/18/2015 Application: Which units are best to describe the length of your finger? 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? Light Years Practice Objects Lengths Finger Pencil Book Desk Desk to wall Your desk to teachers Desk

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

3. February 18, 2015 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. 1. Starter 2. Notes 3. Connection 4. Exit

4. DateLecture/ Activity/ Lab Page Table of Contents 1/26 Wind, Climate, and Ocean Currents 155-156 1/27 Convection and Ocean Currents 157-158 1/28 Fronts and Air Masses 159-160 1/29 Pressure and Atmospheric Movement 161-162 2/2 Weather Walk Lab 163-164 2/3 Severe Weather and Precipitation 165-166 2/5 Rotation, Revolution, and seasons 167-168 2/6 Seasons Lab 169-170 2/9 Moon Phases and Eclipses 171-172 2/10 Moon Phase Graphic Organizer 173-174 2/11 Lunar Lollipops 175-176 2/12 Tides Notes 177-178 2/13 Tides Activity 179-180 2/17 Early Astronomers 181-182 2/18 Light Years 183-187

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

6. Date Lecture/ Activity/ Lab Page 11/14 Quiz and Writing 99-100 11/17 CBA Review 101-102 11/19 Solar System 103-104 11/20 Solar System Web 105-106 11/21 Solar System Writing and Quiz 107-108 11/20-12/1 Solar System Web 109-110 12/2 Planetary Soda Pop Lab 111-112 12/3 Conditions for Life 113-114 12/4 Space Mission Notes 115-116 12/5 Solar System II with Writing 117-118 12/8 Space Exploration 119-120 12/110-11 Space Mission Poster 121-122 12/15 Early Astronomers 123-124 12/16 Light Years 125-126 Table of Contents

7. 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. 1. Length of your index finger 2. Length of a book 3. Length of pencil 4. Length of desk 5. Length of your desk to a wall. II. Practice

8. Which units are best to describe the length of your finger? 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? III. Application

9. Which units are best to describe the distances of objects to the wall? What unit would you not use to describe far distances? Why? Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp 2/18/2015 183 184 2/18/2015 Application: Which units are best to describe the length of your finger? 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? Light Years Practice Objects Lengths Finger Pencil Book Desk Desk to wall Your desk to teachers Desk

10. Notes go here!!! IV. Connection

11. 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

12. 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.

13. 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.

14. 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.

15. Which units are best to describe the distances of objects to the wall? What unit would you not use to describe far distances? Why? Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp 2/18/2015 183 184 2/18/2015 Application: Which units are best to describe the length of your finger? 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? Light Years Practice Objects Lengths Finger Pencil Book Desk Desk to wall Your desk to teachers Desk