Transcript light year
183 Light Years 2/18/2015 Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp Practice Objects Finger Pencil Book Desk Desk to wall Your desk to teachers Desk Light Years Application: 184 2/18/2015 Which units are best to describe the length of your finger? •What measurement unit would be used to measure from your desk to Lengths 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 •Which units are best to describe Exit : Why is a light year the distances of objects to the called a light year? wall? •What unit would you not use to describe far distances? Why? TOC: Light Years I. Starter Describe what the following terms measure: Mph, knots, mach, light yr., warp 1. Starter 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. 2. Notes 3. Connection 4. Exit Table of Contents Date 1/26 1/27 1/28 1/29 2/2 2/3 2/5 2/6 2/9 2/10 2/11 2/12 2/13 2/17 2/18 Lecture/ Activity/ Lab Wind, Climate, and Ocean Currents Convection and Ocean Currents Fronts and Air Masses Pressure and Atmospheric Movement Weather Walk Lab Severe Weather and Precipitation Rotation, Revolution, and seasons Seasons Lab Moon Phases and Eclipses Moon Phase Graphic Organizer Lunar Lollipops Tides Notes Tides Activity Early Astronomers Light Years Page 155-156 157-158 159-160 161-162 163-164 165-166 167-168 169-170 171-172 173-174 175-176 177-178 179-180 181-182 183-187 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 warp Mach Speed that spacecraft travels Speed a plane travels when it breaks the sound barrier Table of Contents Date Lecture/ Activity/ Lab 11/14 Quiz and Writing 11/17 CBA Review 11/19 Solar System 11/20 Solar System Web 11/21 Solar System Writing and Quiz 11/20-12/1 Solar System Web 12/2 Planetary Soda Pop Lab 12/3 Conditions for Life 12/4 Space Mission Notes 12/5 Solar System II with Writing 12/8 Space Exploration 12/110-11 Space Mission Poster •12/15 Early Astronomers 12/16 Light Years Page 99-100 101-102 103-104 105-106 107-108 109-110 111-112 113-114 115-116 117-118 119-120 121-122 123-124 125-126 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. 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. III. Application •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? 183 Light Years 2/18/2015 Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp Practice Objects Finger Pencil Book Desk Desk to wall Your desk to teachers Desk Light Years Application: 184 2/18/2015 Which units are best to describe the length of your finger? •What measurement unit would be used to measure from your desk to Lengths 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 •Which units are best to describe Exit : Why is a light year the distances of objects to the called a light year? wall? •What unit would you not use to describe far distances? Why? IV. Connection Notes go here!!! 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 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. 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. 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. 183 Light Years 2/18/2015 Starter: Describe what the following terms measure: Mph, knots, mach, light yr., warp Practice Objects Finger Pencil Book Desk Desk to wall Your desk to teachers Desk Light Years Application: 184 2/18/2015 Which units are best to describe the length of your finger? •What measurement unit would be used to measure from your desk to Lengths 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 •Which units are best to describe Exit : Why is a light year the distances of objects to the called a light year? wall? •What unit would you not use to describe far distances? Why?