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.

• 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

12/16/2014

125 12612/16/2014

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?

Light YearsLight Years

Practice

Objects Lengths

Pencil

Book

Desk

Desk to wall

Describe what the following terms

measure:

Mph, knots, mach, light yr., warp

TOC: Light Years

I. Starter

December 16, 2014AGENDA

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. Notes3. Connection

4. Exit

Describe what the following terms

measure:

I. Starter

Mph Speed showing the miles an object travels in a hour

Knots Speed a boat travels

Light year Distance travels in a year

warpSpeed that spacecraft travels

Mach Speed a plane travels when it breaks the sound barrier

Date Lecture/ Activity/ Lab Page11/14 Quiz and Writing 99-10011/17 CBA Review 101-10211/19 Solar System 103-10411/20 Solar System Web 105-10611/21 Solar System Writing and Quiz 107-10811/20-12/1 Solar System Web 109-11012/2 Planetary Soda Pop Lab 111-11212/3 Conditions for Life 113-11412/4 Space Mission Notes 115-11612/5 Solar System II with Writing 117-11812/8 Space Exploration 119-12012/110-11 Space Mission Poster 121-122• 12/15 Early Astronomers

123-12412/16 Light Years 125-126

Table of Contents

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 a book

2. Length of pencil

3. Length of desk

4. Length of your desk to a wall.

II. Practice

• 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

• 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

2/18/2014

177 1782/18/2014

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?

Light YearsLight Years

Practice

Objects Lengths

Pencil

Book

Desk

Desk to wall

Notes go here!!!

IV. Connection

Light YearThe 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.

• 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

12/16/2014

125 12612/16/2014

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?

Light YearsLight Years

Practice

Objects Lengths

Pencil

Book

Desk

Desk to wall