NAME_____________________________ PERIOD______________ DATE______________ CVHS/Dr. Day 9/30/15
Periods 1, 4, 6 DNA Extraction Lab Tuesday
Periods 3 & 5 DNA Extraction Lab Thursday
Non Lab = Metrics, Conversions, & DNA Lab Quiz
I. Complete the Table and Conversion Nanometers to Meters (Mon Handout)
GL will show you a few examples.
II. Let’s learn the Unit Conversion Method (Unit Cancelling Method)
III. Now let’s use our new expertise to look how fast we are traveling.
Take a guess, How fast is the Earth Moving in Miles/Hour?
•How fast is the Earth spinning?
•How fast is the Earth revolving around the
Sun?
•How fast is the Solar System moving
around the Milky Way Galaxy?
•How fast is our Milky Way Galaxy moving
in the Local Group of galaxies?
HOW FAST IS THE EARTH MOVING?
You can't measure the speed of an object by itself, it has to be measured relative to something else
(this was one of Einstein's realizations).
If we ask the question, "How fast the Earth is moving?" we have to specify that we want the speed
with respect to another object. Motion cannot be measured without a reference point. We can ask
how fast the earth is moving with respect to its own axis, the Sun, the Milky Way Galaxy, or our
Local Group of galaxies.
NAME_____________________________ PERIOD______________ DATE______________ CVHS/Dr. Day 9/30/15
The Complex Motion of the Earth
Convert the speeds km/sec to miles/hour using the Unit Conversion Method. You may be
surprised.
The Earth spins around its axis as
0.5
•How fast is the Earth spinning?
km/sec miles/hr it orbits the Sun. Our entire Solar
System slowly orbits around the
•How fast is the Earth revolving around
30
Milky Way Galaxy. The Milky
the Sun?
km/sec miles/hr
Way Galaxy belongs to the Local
•How fast is the Solar System moving
250
Group of galaxies, where it is
around the Milky Way Galaxy?
km/sec miles/hr also moving.
•How fast is our Milky Way Galaxy
300
moving in the Local Group of galaxies?
km/sec miles/hr
ASSIGNMENT:
Change these four speeds from Km/sec to Miles/hour to get a feel for how fast we are
really traveling.
Slow down you move too fast
You got to make the morning last
Just kicking' down the cobblestones
Looking' for fun and feeling' groovy……..
http://www.youtube.com/watch?v=4KZi-aV0VTk
HOW FAST IS THE EARTH SPINNING AROUND ITS AXIS?
The Earth is spinning around its axis. At the equator, the Earth's surface moves 40,000 kilometers
in 24 hours. That is a speed of about 1040 miles/hr (1670 km/hr or 0.5 km/sec). This is calculated
by dividing the circumference of the Earth at the equator (about 24,900 miles or 40,070 km) by the
number of hours in a day (24). As you move toward either pole, this speed decreases to almost zero
(since the circumference of the spinning circle at the extreme latitudes approaches zero).
WANT EXTRA CREDIT?
Calculate the speed the Earth travels around the Sun in
miles per hour (knowing the distance from the Earth to
Sun is 93,000,000 miles AND C = 2πr) Must Show your
work. Easy points for the Math inclined.
HOW FAST IS THE EARTH REVOLVING AROUND THE SUN?
The Earth orbits, on average, 93 million miles (149,600,000 km) from the Sun
(this distance is defined as one Astronomical Unit (AU)), taking one year to
NAME_____________________________ PERIOD______________ DATE______________ CVHS/Dr. Day 9/30/15
complete an orbit. The Earth revolves around the Sun at a speed of about 18.5 miles/sec (30
km/sec).
HOW FAST IS OUR SOLAR SYSTEM MOVING WITHIN THE MILKY WAY GALAXY?
The sun is about 26,000 light-years from the center of the Milky Way Galaxy, which is about
80,000 to 120,000 light-years across (and less than 7,000 light-years thick). We are located on on
one of its spiral arms, out towards the edge. It takes the sun (and our solar system) roughly 200-250
million years to orbit once around the Milky Way. In this orbit, we (and the rest of the Solar
System) are traveling at a velocity of about 155 miles/sec (250 km/sec).
HOW FAST IS THE MILKY WAY GALAXY MOVING WITHIN THE LOCAL GROUP
OF GALAXIES?
The Milky way Galaxy is just one galaxy in a group of galaxies called the Local Group. Within the
Local Group, the Milky Way Galaxy is moving about 185 miles/sec (300 km/sec
NAME_____________________________ PERIOD______________ DATE______________ CVHS/Dr. Day 9/30/15
CONVERT THE FOLLOWING TO Miles per hour.
How fast is the Earth spinning?
0.5 km/sec
Miles/hour
How fast is the Earth revolving around the Sun?
30 km/sec
Miles/hour
How fast is the Solar System moving around the
Milky Way Galaxy?
250 km/sec
Miles/hour
How fast is our Milky Way Galaxy moving in
the Local Group of galaxies?
300 km/sec
Miles/hour
186,000 Miles/sec
Miles/hour
1 Light Year
SHOW YOUR WORK
Explain what the following do in the DNA Extraction Protocol.
EDTA
Table Salt (NaCl)
Meat Tenderizer
Detergent
Ice Cold Ethanol
Ice Bath
600 Water Bath
Blender