
Do Now – (April 2nd (A) & 3rd (B) )

Turn in your HW.
 Take a copy of: BIG BANG – Movie Notes and Webquest...set
aside for later
 Take a copy of: What the #?*!$...set aside for later
 Take a study guide if needed for your TEST next Thursday (also
linked on Genesis and on my Website)
 Answer this question in your notes: WHY is the Earth round? And
for that matter, why are most planets / stars round…why not
cubes? Or pyramids?
HW– for 4th MP


TEST on CH. 9 &12 on April 10th (A) & 11th (B)

The Worksheet from today (BIG BANG – Movie Notes and Web Quest)
must be finished on April 8th (A) & 9th (B). You are responsible for
all info on it…fair game to appear on your test! Must be finished by the
class prior (4/8 & 4/9) to your test so that you can ask questions if you
need help / clarification!
HW Due today and last class…
#15-16, 21 – 24 (due last class)
 #26, 27, 29, 32 – 34 (due today)
 Get your clickers ready
 Choose the answer that best
corresponds with your answer.

#15: Calculate the force of Gravity on a
1kg mass at Earth’s Surface (Earth’s
mass is 6 x 10 ^24 kg, and it’s radius is
6.4 x 10^6 m)
0%
1.
0%
2.
0%
3.
0%
4.
0%
5.
0%
6.
1N
6 x 10^24 N
9.4 x 10^17 N
1.5 x 10 ^11 N
9.77 N
Answer is not listed
10
#16: Calculate the force of Gravity on the same
1kg mass at 6.4 x 10^6 m above Earth’s
Surface…that is, 2X as far from earth’s center!
(Earth’s mass is 6 x 10 ^24 kg)
0%
0%
1.
2.
0%
3.
0%
4.
0%
5.
0%
6.
Gravity would be 2x as
much…19.54 N
Gravity would be ½ as
much…4.89 N
Gravity would be 4x as
much…39.08 N
Gravity would be ¼ as
much…2.44 N
Gravity would be the
same…9.77 N
Answer is not listed
10
21. Comment on whether or not this label is cause
for concern…
1.
0%
2.
0%
3.
0%
Yes! Definitely cause for
concern – how scary is
this!
Nope – not concerned –
simply restating Newton's
ULOG
I have no clue what is
going on
10
22. Earth and moon are grav. attracted..…
1.
0%
2.
0%
3.
0%
The more massive Earth
attracts moon w/ a greater
force (Earth exerts more
force)
The less massive moon
attracts earth with a greater
force (Moon exerts more
force)
The forces are equal / the
same
10
23. Woman weighs 500 N; what is the grav. force
on her?
0%
0%
1.
2.
0%
3.
0%
4.
0%
5.
6.
0%
More than 500 N away from
Earth’s center
Less than 500 N away from
Earth’s center
More than 500 N toward
Earth’s center
Less than 500 N toward
Earth’s center
500 N toward Earth’s center
500 N away from Earth’s
center
10
24. If gravity from sun on planets disappeared… ?
1.
0%
2.
0%
3.
0%
Planets would immediately
stop moving and stay
where ever they are
Planets would start moving
straight towards sun and
crash into it
Planets would take a
tangent path
10
26. If the moon were 2x as massive, would force of
earth on moon be 2x as large? Of moon on earth?
0%
1.
0%
2.
0%
3.
0%
4.
Yes, yes
No, no
No, yes
Yes, no
10
27. Which requires more fuel – a rocket traveling
from Earth to the moon, or a rocket traveling from
the moon to earth? Why?
0%
1.
0%
2.
0%
3.
0%
4.
from Earth to the moon
the moon to earth
Same
Not enough info
10
29.Jupiter is 300x as massive as earth but you
only weigh 2.5x as much (not 300x as much).
Why?
0%
0%
0%
0%
0%
1.
2.
3.
4.
5.
Because Jupiter is more
massive than Earth
Because Jupiter is less
massive than Earth
Because Jupiter has a
bigger radius than Earth
Because Jupiter has a
smaller radius than Earth
No clue
10
32.Earth’s mass and diameter both double – how
does your weight change?
0%
1.
0%
2.
0%
3.
0%
4.
0%
5.
0%
6.
0%
7.
½ as much
2x as much
¼ as much
4x as much
1/8 as much
8x as much
Weight stays the same
10
33.On a ladder so you’re 2x as far from Earth’s
center – how does your weight change?
0%
A.
0%
B.
0%
C.
0%
D.
0%
E.
0%
F.
0%
G.
½ as much
2x as much
¼ as much
4x as much
1/8 as much
8x as much
Weight stays the same
10
34.Estimate Jupiter’s diameter compared to
Earth’s
0%
1.
0%
2.
0%
3.
0%
4.
0%
5.
0%
6.
0%
7.
2.5 times as much
11 times as much
120 times as much
300 times as much
700 times as much
2250 times as much
Answer is not listed
10
BIG BANG – Movie Notes and Web
Quest DISCLAIMER






Please note, the Big Bang is a THEORY that current scientific research SUPPORTS (notice
the terminology…”supports” not “proves”). Science is always changing, so the research
supporting this theory could change today, tomorrow, 100 years from now, etc.
The point is, the Big Bang is neither proven nor unproven; current research at this time
simply supports it.
With that in mind, I would like to quote the film you are about to watch (How the
Universe Works: Big Bang, 2010). It states, in order to understand the Big Bang, “you
have to buy into the premise that something was created out of nothing.”
It then further addresses this by Einstein’s famous equation, E=mc2…stating that
mass/matter was created by energy during the Big Bang.
However, the film does NOT attempt to address where that energy came from. It is up
to formulate your own beliefs regarding this. I will never tell you what to believe or
what is “right” or “true” regarding the Big Bang theory, nor we will attempt to delve into
religion or philosophy, as this is a SCIENCE class. It is up to you to decide where you
draw the line on what you believe.
However, when an assessment asks you about what current scientific studies support,
(once again, I will never use the words “PROVE” or “FACT” etc.), you are expected to
provide the research that is presented in the film.
Discovery Education
How the Universe Works: Big Bang
 Full Video: [43:05]
 We are watching approx. 30 minutes of
segments

The TWO-INCH Universe
A powerful set of analogies to
examine size and distance in
astronomy
Source: smithsonianeducation.org
Earth’s diameter = 8,000 miles

QUESTION: If Earth is just two inches
wide, how big would the Moon be at this
scale?
Object
To Scale
Actual
Earth
2 inches
8000 mi
Moon = ¼ inch!

actual diameter = 2,000 miles
QUESTION: At this scale, how far apart
should they be?
Object
To Scale
Actual
Earth
2 inches
8000 mi
Moon
¼ inch
2000 mi
5 feet!

actual Earth-moon distance = 240,000
miles …1 light second!

QUESTION: How big should the sun be in
this analogy?
Object
To Scale Actual
Earth
2 inches
8000 mi
Moon
¼ inch
2000 mi
Earth –
Moon
5 feet
240000
mi
A minivan (16 feet across)!


Actual Sun diameter =
875,000 miles
QUESTION: If the 2inch Earth were placed
in the middle of the
classroom, where
would the minivan
need to be parked to
represent the position
of the sun at this scale?
Object
To Scale
Actual
Earth
2 inches
8000 mi
Moon
¼ inch
2000 mi
Earth to
Moon
5 feet
240000
mi
Sun
16 feet
875000
mi
6 football fields away!

Actual Earth-Sun distance
= 93,000,000 miles or 8
light minutes
Object
To Scale
Actual
Earth
2 inches
8000 mi
Moon
¼ inch
2000 mi
Earth to
Moon
5 feet
240000 mi
Sun
16 feet
875000 mi
Earth to
sun
6 football
fields
93,000,000
mi
NEW ANALOGY

Scale down the minivan sun into a 2inch sun

QUESTION: At this scale, how big
would Earth be?
A grain of salt!

QUESTION: How big would the moon be?
A speck of dust!

QUESTION: How far away would this
“speck of dust” moon be from the “grain of
salt Earth”?
½ inch!

QUESTION: How far away would the sun
be from the “grain of salt” Earth?
20 feet!
New Analogy: 2-inch Solar System
Sun speck in center, planets would be
invisible at this scale!
 Actual solar system size = 7,000,000,000
miles (10 light-hours)


Next nearest star at this scale (Proxima
Centauri) would be 2 football fields away!

Actual distance = 25.8 trillion miles or 4.3 LY

Sun is 1 of billions of stars in our galaxy

QUESTION: At this scale, how big is the
Milky Way?
About the size of North America

Actual Milky Way size = 100,000 LY

At this scale, if the tiny dot of light at the
center of the solar system were a grain of
salt, a teaspoon of the salt would
represent about 100,000 of the Milky
Way’s 200+billion stars!
New Analogy: The Realm of
Galaxies




Side note: Andromeda galaxy is a galaxy that is
very near the Milky Way and is seen as a single
smeary light to the naked eye
Actual Andromeda size = 1.3 million trillion miles
(220,000 LY)
Shrink the “continent-size Milky Way” down to 2inches
QUESTION: If Milky Way is 2-inches big, what is
the distance between these two galaxies?
~ 5 feet!

Actual Milky Way-Andromeda distance = 15
million trillion miles (2.5 million LY)

At this scale, individual stars in these galaxies
would not be visible even with a microscope
At this scale, the deep space galaxies seen by
Hubble would be 4 miles from this classroom!
So…QUESTION: How big is the universe?
Let’s watch: http://htwins.net/scale2/



From now until the end of class…
Work on the web quest from today
 Whatever is not finished becomes HW due on
April 8th (A) & 9th (B). You are responsible for all
info on it…fair game to appear on your test! Must be
finished by the class prior (4/8 & 4/9) to your test so
that you can ask questions if you need help /
clarification!
May work alone or in groups… good luck!


TEST on CH. 9 &12 on April 10th (A) & 11th (B)