write the following speed terms on your warm up sheet. beside each one write what you think each of...
TRANSCRIPT
Write the following speed terms on your warm up sheet.
Beside each one write what you think each of the terms measure. Mph - Knots - Mach - Light year - Warp -
Monday, March 17 2014 Warm up
Mph miles traveled per hour
Knots time it takes to travel 1 nautical mile per hour
Mach objects speed divided by the speed of sound
Light year distance traveled by light in 1 year
Warp doesn’t exist except on Star Trek – faster than the speed of light
Modeling a Light YearRead through the procedure.Copy the Data TableAssign Jobs:
RecorderWalkerTimerMeasurer
Perform the procedure.Calculate your Student MinuteAnswer the questions in your notebook
using complete sentences.
Tuesday, March 18, 2014Warm up
Light travels at approximately 18,000,000 km/min.
The sun is approximately 150,000,000 km from Earth.
How many minutes does it take the sun’s energy to travel to Earth ?
Answer using a complete sentence. Hint: Set up a proportion or use the formula
for speed. You may use a calculator
Nine Week Test - Friday
Forces that change the shape of the earth Topography Sun, Moon, Earth relationships
Science Benchmark – Wednesday, March 26
Analysis of Model of Light Years
In the model, what represented the light and what represented the year?
How is a student minute similar to a light year?
How is a student minute different from a light year?
Why do astronomers use light years instead of kms to measure distances in the universe?
If a star located 65 light years away from Earth stops giving off light energy at this very moment, how long will it be before we can know it?
When using a telescope to observe the stars, some say they are observing the past instead of the present. What does this mean?
SO, WHAT TYPE OF MEASURING
UNIT WOULD WE NEED FOR
DISTANCES ACROSS SPACE?
LIGHT YEAR
How far is far?
How fast is fast?
What Is It?
A light year is the DISTANCE that light will travel, through a vacuum, in 1 year.
What is the fastest speed we know?
The Speed of Light
Speed of Light
c = 300,000 km per second
or 186,000 miles per second
Speed of Light
To get an idea of how fast this is. . . light can travel about seven times around Earth in one second!
WEDNESDAYMARCH 19, 2014
WARM UPCopy the information below and calculate the answers. Use a calculator.
Light travels at 300,000 km/sec_____________km/min_____________km/hour_____________km/day_____________km/year
How far is a light-minute?
A light-hour?
A light-day?
A light-year?
18,000,000 km or 11,160,000 mi
1,080,000,000 km or 669,600,000 mi
25,920,000,000 km or 16,070,400,000 mi
9,460,800,000,000 km or 5,865,696,000,000 mi
OUR SOLAR SYSTEM IS ABOUT 10 LIGHT-HOURS ACROSS.
So, how many kilometers across is our solar system?
1,080,000,000 x 10 =?
IN OUR LOCAL STELLAR NEIGHBORHOOD, AN AREA OF 10 LIGHT-YEARS ACROSS, THERE ARE
LESS THAN A DOZEN STARS.
FROM OUR LOCAL SYSTEM, LOCATED IN
ONE OF THE MILKY WAY GALAXY’S SPIRAL
ARMS, IT IS ABOUT 30,000 LIGHT-YEARS TO
THE CENTER OF THE MILKY WAY.
IT TAKES LIGHT 100,000 YEARS TO TRAVEL
ACROSS THE MILKY WAY GALAXY.
THE MILKY WAY AND THE 31 OTHER GALAXIES THAT FORM THE LOCAL GROUP ARE ALL
WITHIN 3 MILLION LIGHT YEARS OF
EACH OTHER. BEYOND THEM IS A GAP OF SEVERAL MILLION LIGHT-YEARS BEFORE OTHER GROUPS OF GALAXIES ARE
ENCOUNTERED.
A light-year is the distance light travels , in a vacuum, in one year.
9.5 trillion kms or 6 trillion mi
Thursday March20, 2014Warm up
When we see the star Betelgeuse in the Orion constellation, we are seeing the light that left that star approximately 640 years ago.
So, what is the distance of Betelgeuse from Earth?
Explain why this is like looking into the past?
Answer in complete sentences!
Friday Warm upMarch 21, 2014
Warm ups are on the table.
Follow the directions.
Monday Warm upMarch 24, 2014
Remembering back to your web-quest assignment from last week:
What does AU stand for?
What does it measure?
Talk in your group and discuss the answers.
Why “ly”? Light years are used to measure the vast distances in space. In the universe, the
kilometer measure is too small to use.
The symbol for light year is “ly”.
For example, the distance to the next nearest big galaxy, the Andromeda Galaxy, is 21 quintillion km. That's 21,000,000,000,000,000,000 km. This is a number so large that it becomes hard to write, to relate to, and to use in calculations.
History Seen Every time you look at objects in the night sky or the Sun, the light from that object is old. You are looking at history.
An Example It takes 8.3 light minutes for
light leaving the Sun to reach the Earth.
To put this in perspective, if you could drive from the surface of the Sun to the surface of the Earth, it would take you 180 years driving nonstop at 60 mph.
Example: Sirius Sirius, in the constellation Canis Major, is the sky’s brightest star.
It is easy to find on winter and spring evenings. When you look at Sirius, you are looking back in time to see how Sirius looked 8 years ago. The light left the star 8 years ago.
Read the Big Bang Theory
As you read: Write in the margins any questions you
have Circle the date of the theory Highlight the names of the scientists
associated with the theory Underline important concepts of the
theory Highlight the main ideas of the evidences
of the theory
Tuesday Warm upMarch 25, 2014
Briefly explain your understanding of the big bang theory.
Use sentences.
Expanding Universe Lab
Follow the directions.
Analyze the data by answering the questions.
Thursday, March 27, 2014
Sit where you were yesterday.
If you need a pencil, I will provide it.
#2What is the density of the mineral sample.Mass – 14.7 gVolume – 2.2 cm³
Griddables
Answer on the back of your scantron.
#17 – C1 #30 – C2 #38 – C3 #44 – C4
Analysis of Expanding Universe Lab
1. Imagine that Location A on the balloon is the Milky Way and the other locations are distant galaxies outside the Local Group. How would you describe the motion of the other galaxies?
2. How do scientists know if other galaxies in the universe are moving farther away from us?
3. Is this a good model of the universe? Explain.
The Big Bang Theory
12 – 15 billion years ago matter gathered together under pressure
Hot, dense, ball expanded rapidly Helium, hydrogen and other gases radiated
into space Gases cooled, collected and formed galaxies Expansion continues indefinitely eventually
becoming cold and dark- Open Universe Theory Closed Universe Theory – Expansion continues
until gravity pulls galaxies back in and another big bang occurs
The Oscillating Theory Universe began with big bang Will not end Expands outward and slows down Will stop and contract back inward Repeat cycle
Steady State Theory Universe remains constant forever
Red ShiftSupport for the Big Bang Theory
Galaxies moving away, waves lengthen - red shift
Galaxies moving toward us, waves shorten – blue shift
Galaxies beyond our Local Group of galaxies show red shift, therefore it is believed that the universe is expanding.
Big Bang Theory
Write a paragraph explaining what you understand about the Big Bang Theory.
Include what you think the theory states and why
you think it may or may not be true
What you think will happen to the universe in the future
Why you think it is important to study the universe
Monday, March 12, 2012
Focus sheets are on the table.
Read each one.
Copy the answer stem and fill in with the correct answer.
Benchmark 2013 Passing Standard – 54%
Average Score : 68
144 Students Tested/103
122 Passed/ 87
85% passing rate/ 84
Tuesday FocusMarch 13, 2012
Write the sentence and fill in the blanks.
In my mind, the Universe is_____________________ and is made up of __________________________.
Timeline Develop a timeline for the scientists and their
theory of the universe. Your timeline should include: Name of the theory Scientist /s associated with the theory Even appropriate increments. (count by 50’s or
100’s) A brief summary of the theory (5-10 words) Title the timeline. Use manilla paper Use a ruler. Neatness counts.
Origins of the Universe Theories
Research project. 10 theories. Big Bang Theory is the most widely
accepted. Share theories. Timeline assignment.
Google: name of theory Thinkquest, pbs, britannica are the best
resources to use.
Friday, March 9, 2012
Based on what you read yesterday, write a brief summary of the Big Bang Theory.
Briefly state 2 supports for this theory.
When you finish, pick up your computer and get started.