FADTP 3-1
description
Transcript of FADTP 3-1
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FADTP 3-1
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We are learning to: describe how objects in the solar system are in regular and predictable motions that explain days, years, and seasons.
We are looking for: description of: • Days- Earth rotates on its axis every 24 hours• Years-Earth revolves around the sun 365.25
days• Seasons-Earth revolves around the sun as the
Earth is tilted on its axis
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Movement of the Earth• Rotation is the earth
spinning on its axis.– Earth’s rotation causes day
and night (approx. 24 hours).
• Revolution is the movement of one object around another object.– This is the movement of
the earth around the sun.– Earth’s revolution
determines the length of a year(365.25 days).
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Seasons on Earth• Earth has seasons because its
axis is tilted as it moves around the sun.
• Vernal equinox has equal day and night (March).
• Summer solstice has the longest day and shortest night (June).
• Autumnal equinox has equal day and night (September).
• Winter Solstice has the shortest day and longest night (December).
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Seasons continued• During equinoxes, the
sun is directly over the equator.
• During the summer solstice, the sun is directly over the Tropic of Cancer.
• During the winter solstice, the sun is directly over the Tropic of Capricorn.
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Why do we have night and day?
Earth’s
rotat
i...
Earth’s
revo
lu...
Tilt of th
e Ea..
.
I nee
d Help!
0 000
A. Earth’s rotationB. Earth’s revolutionC. Tilt of the Earth on
its axisD. I need Help!
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What causes Earth to experience different seasons?
It ro
tates
on ...
It rev
olves
on...
It is
tilted
w...
It is
tilted
w...
I nee
d help!
0 0 0000of5
A. It rotates on its axis while it revolves around the sun
B. It revolves on its axis while it rotates around the sun
C. It is tilted while it rotates around the sun.
D. It is tilted while it revolves around the sun.
E. I need help! 10
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If the Earth’s Revolution was slower, we would experience
Longer d
ays
Shorter d
ays
Longer y
ears
Shorter y
ears
I nee
d help!
0 0 000
A. Longer daysB. Shorter daysC. Longer yearsD. Shorter yearsE. I need help!
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Of the following, which does not affect seasons?
Earth i
s tilte
d 23.5
d...
The Eart
h revo
lves a
...
The Eart
h’s dist
ance
...
I nee
d help!
0 000
A. Earth is tilted 23.5 degrees
B. The Earth revolves around the sun
C. The Earth’s distance from the sun
D. I need help!0of5
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3. REVIEW
1. PRACTICE
4. FRONTLOADPre/Post Check Key Terms
2. EXTENSION
Pretend you live in Northern Alaska. Write a paragraph about what the hours of day and night would be like the summer and winter.
Make a drawing that illustrates the difference between a year and a day.
____ Eclipse ________ Lunar Eclipse ________ Solar Eclipse ____
____ Tides ________ Spring Tide ________ Neap Tide ____
____ Moon Phases ________ Crater ____
What laws of motion apply to our new astronomy unit? Explain.
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We are learning to: describe how objects in the solar system are in regular and predictable motions that explain phases (moon cycles), eclipses, tides We are looking for: a description of -Phases-moon revolves around the Earth approximately once a month
-Eclipse-are random predictable; one object moves in front of another object in relation to the position of the sun
-Tides-high tide occurs approximately twice a day due to the gravitational pull of the moon
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Phases of the Moon• The moon is illuminated by
the sun.• The moon reflects sunlight to
the earth.• The different phases of the
moon is affected by the moon revolving around the earth as the earth revolves around the sun.
• The complete cycle of phases takes 29.5 days, this is known as a synodic month.
• Each phase takes about 3.5 days.
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Solar Eclipses• Occurs during a new moon
when the moon is between the sun and earth.
• The shadow is the umbra, the partial shadow is the penumbra.
• Doesn’t happen every month because the moon’s orbit around the earth is tilted and this prevents the sun, earth and moon from being in a straight line.
• Do not look at a solar eclipse without protective eye gear.
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Lunar Eclipse• Occurs during a full moon
phase when the earth is between the sun and the moon.
• More common than the solar eclipse.
• Can be view without protective eye gear.
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Tides• Tides are caused by the
gravitational attraction between the moon and earth.
• High tides are 12.5 hours apart.
• Spring tide is the highest high tide and occur at full and new moon phases.
• Neap tide is the lowest high tide and occur at first and last quarter moon phases.
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Which phase occurs when the moon is in between the Earth and
the sun?
Full moo
n
New m
oon
1st Q
uarter
moon
3rd q
uarte
r moo
n
0 000
A. Full moonB. New moon C. 1st Quarter moonD. 3rd quarter moon 0
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What causes us to see different phases of the moon?
Light re
flects
...
The moo
n revo
l...
We s
ee diffe
re...
All of th
e abo...
0 000
A. Light reflects off of the surface of the moon.
B. The moon revolves around the Earth.
C. We see different perspectives of the moon.
D. All of the above.
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What is the main cause of tides?
The gravita
tional pull o
f...
The gravita
tional pull o
f...
The gravita
tional pull o
f...
I need help!
0 000
A. The gravitational pull of the moon
B. The gravitational pull of the sun
C. The gravitational pull of the Earth
D. I need help!
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If the sun, moon, and Earth are perfectly aligned (as pictured), what event will occur on Earth?
Nea
p Tide
Solar E
clipse
Lunar Ecli
pse
Seaso
nal C
hange
0 000
A. Neap TideB. Solar EclipseC. Lunar EclipseD. Seasonal Change
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When studying a solar eclipse, which would be a proper method of viewing the sun?
Wea
r sung
lasse
...
Use a
teles
cop..
.
Use a
magnify
i...
Use fil
ters t
h...
I nee
d help!
0 0 000
A. Wear sunglassesB. Use a telescopeC. Use a magnifying
glassD. Use filters that are
specifically designed to view eclipses
E. I need help!
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FOUR BLOCK INTERVENTION INSTRUCTIONS
1. If you have not missed any questions, start with block #2 and then complete blocks #3 and #4.
2. If you have missed 2 or more, meet with the teacher.
3. Everyone else starts in block #1 and then complete blocks #2, #3, and #4.
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3. REVIEW
1. PRACTICE
4. FRONTLOAD
2.EXTENSION
What would happen to the earth’s tides if the moon was not present?
Using your knowledge of moon, write a paragraph (6-10 sentences)explaining why or why not?
Draw a diagram illustrating all of the phases of the moon.Label all of the phases.
What do you know about gravity and inertia?
Explain how the moon affects the earth.
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We are learning to: explain that gravitational force determines motions in the solar system and keeps the planets in orbit around the sun. We are looking for: explanation that
*All objects in the solar system have gravity.
*Sun has the greatest mass, thus has the greatest gravitational pull within our solar system.
*Since planets have inertia, they do not get pulled into the sun.
*Gravity keeps the planets in orbit.
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Models of the Solar System
• In the geocentric model, Earth is at the center of the revolving planets.
• Aristotle stated that the earth was in the center of the solar system.
• Ptolemy stated that the earth was in the center of the universe. He thought that the planets moved in small circles as they moved around the earth.
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Models of the Solar System
• In the heliocentric model, Earth and the other planets revolve around the sun.
• This model was developed by Nicolaus Copernicus.
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Galileo
• Used a telescope to view the solar system.
• Observed the four larger moons that orbited Jupiter.
• Observed the phases of Venus
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Brahe & Kepler
• Brahe carefully observed the positions of the planets.
• Kepler had wrote laws that explained the behavior of planets orbiting the sun.
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Forces that Keeps Planets in Orbit Around the Sun
• Newton concluded that two factors, inertia & gravity, combine to keep the planets in orbit.– Inertia is
tendency of an object to resist a change in motion.
– Gravity is the force that attract all objects toward each other.
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What is an object’s resistance to a change in motion?
Gravity
Inerti
a M
ass
Fricti
on
I need help!
0 0 000
A. GravityB. InertiaC. MassD. FrictionE. I need help!
0of5
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Predict what would happen if Earth stopped its forward motion around the sun?
It will
fly off into sp
ace.
It will
hit the neare
st pl...
It will
get pulle
d into th
...
It will
continue to
revolve.
0 000
A. It will fly off into space.B. It will hit the nearest
planet.C. It will get pulled into the
sun.D. It will continue to
revolve.
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What keeps planets revolving around the sun?
The sun’s g
ravitational p
ull.
The planet’s m
ass.
The planet’s m
agnetic fi
eld.
The Sun’s i
nertia.
I need help!
0 0 000
A. The sun’s gravitational pull.
B. The planet’s mass.C. The planet’s magnetic
field.D. The Sun’s inertia.E. I need help!
0of5
10
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Please copy circle and do this.
Orbit
Gravity
• Fill in two words that closely relate to the two words given.
• Write a paragraph explaining the significance of each word and how they fit together to form a concept?
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We are learning to: *Compare the composition and orbits of comets and asteroids with that of Earth.
We are looking for: Composition of comets, asteroids, and Earth1. Earth is composed of rock with many layers and has a core of dense metal2.Comets are composed of ice and dust (dirty snowball)3. Asteroids are composed of chunks of solid rock with heavy metalOrbits of comets, asteroids, and Earth’s1.Earth’s orbit is elliptical 2. Comet’s orbit is elongated and elliptical 3. Asteroids are elliptical and orbit in the asteroid belt or the Kuiper belt.
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We are learning to: Describe the effect that asteroids or meteroids have when traveling through space and entering planetary atmospheres.
We are looking for: 1. Asteroids are large rocky objects that orbit the sun. If
they hit the Earth the impact could be catastrophic. 2. Meteorites are small rocky objects hit the Earth all the
time and do not cause much damage. 3. A rock changes its classification based on its location:
Meteoroid – rock located in outer spaceMeteor – rock burning up in the Earth’s atmosphere (Shooting Star/Meteor
Shower)Meteorite – rock that hits the ground
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The Sun
• The sun produces its energy from nuclear fusion (core must reach 15 million degree Celsius).
• Sun’s Atmosphere:– The photosphere is the
inner layer of the sun that makes light.
– The chromosphere is the middle layer and produces color.
– The corona is the outer layer of the sun and produces ultraviolet radiation.
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Solar Features
• Solar winds are a stream of electrically charged particles coming from the corona.
• Sunspots are areas of gas on the sun that are cooler than the gases around them.
• Prominences are reddish loops of gas.
• Solar flares are large explosions of gas on photosphere.
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Inner Planets
• Total of eight planets in our solar system.
• The inner planets are also called the terrestrial planets.
• Small in Size.• Have rocky
surfaces.
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Mercury
• Mercury is 0.4 AU from the sun.
• Diameter is 4,878 km.• Rotates every 59
days.• Revolves around the
sun every 88 days.• Very thin atmosphere.• 0 moons.• Temperature between
-170oC to 430oC.• Very heavily cratered.
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Venus
• Venus is 0.7 AU from the sun.
• Diameter is 12,104 km.• Rotates every 243 days
(retrograde).• Revolves around the sun
every 225 days.• Very thick atmosphere of
CO2.• 0 moons.• Temperature 460oC
(Greenhouse Effect).• Sulfuric acid rain.
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Earth
• Earth is 1.0 AU from the sun.
• Diameter is 12,756 km.• Rotates every 24 hours.• Revolves around the sun
every 365.25 days.• Atmosphere of 78%
nitrogen and 21 % oxygen.
• 1 moons.• Temperature ?oC.• 70% of Earth’s surface is
covered by water.
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Mars
• Mars is 1.5 AU from the sun.
• Diameter is 6794 km.• Rotates every 24 hours.• Revolves around the sun
every 687 days.• Thin atmosphere of CO2.• 2 moons(Phobos &
Deimos).• Temperature -153oC to
20oC.• Polar caps of dry ice.• Olympus mons is the
largest volcano in the solar system.
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Outer Planets (Jovian Planets)
• Found outside the asteroid belt between the asteroids and the Kuiper Belt.
• These planets are large and made of gas.
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Jupiter
• Jupiter is 5.2 AU from the sun.
• Diameter is 142,984 km.• Rotates every 9.9 hours.• Revolves around the sun
every 11.9 years.• Thick atmosphere of
hydrogen & Helium.• 63 moons (Io, Europa,
Callisto & Ganymede).• Temperature -110oC. • Great Red spot is a large
storm.• Has a ring system.
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Saturn
• Saturn is 9.6 AU from the sun.
• Diameter is 120,536 km.• Rotates every 10.7
hours. • Revolves around the sun
every 29.4 years.• Thick atmosphere of
hydrogen & helium.• 60 moons (Titan).• Temperature -140oC.• Has an extensive ring
system.
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Uranus
• Uranus is 19.1 AU from the sun.
• Diameter is 51,200 km.• Rotates every 17.3
hours.• Revolves around the sun
every 84 years.• Thick atmosphere of
hydrogen & helium, with traces of methane.
• 27 moons.• Temperature -195oC.• Has a ring system.• Axis is tilted 90o.
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Neptune
• Neptune is 30 AU from the sun.
• Diameter is 49,500 km.• Rotates every 16.1
hours.• Revolves around the sun
every 165 years.• Thick atmosphere of
hydrogen & helium.• 13 moons (Triton).• Temperature -200oC.• Has an ring system.• Had a Great Dark Spot
that has since disappeared.
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Asteriod Belt
• Asteroids are objects revolving around the sun that are too small and too numerous to be considered planets.
• The asteroid belt is located between Mars and Jupiter.
• Asteroids include Ceres, Pallas, Juno and Vesta.
• Over 300 asteroids have been identified.
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Kuiper Belt• The region of the Solar System
beyond the planets extending from the orbit of Neptune (at 30 AU) to approximately 55 AU from the Sun.
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Meteoroids, Meteors & Meteorites
• Meteoroids are pieces of rocks flying through space.
• Meteors are meteoroids that have entered the earth’s atmosphere, burning up because of friction.
• Meteorites are meteors that reach the surface of earth.
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Oort Cloud & Comets• The Oort cloud is where the
comets are found.• Comets are dirty snowballs
that orbit the sun.• A comet has a head and tail,
the head is made of the nucleus and coma.
• The tail of the comet always points away from the sun because of the solar winds.
• Halley’s comet appears every 76 years.
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An icy object that has an elongated orbit around the sun is referred to as
a(n)….
Asteroid
Comet
Mete
or
Mete
orite
I don’t k
now!
0 0 000
A. AsteroidB. CometC. MeteorD. MeteoriteE. I don’t know!
0of5
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The flash of light produced when a meteoroid passes through the Earth’s
atmosphere is a(n)
Astero
id
Comet
Mete
or
Mete
orite
I don’t k
now!
0 0 000
A. AsteroidB. CometC. MeteorD. MeteoriteE. I don’t know!
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Why does a meteoroid create a streak of light when entering the Earth’s atmosphere?
Light fr
om the..
.
Energy i
s rele
...
Lightning
is p...
Light is
a res
...
I don’t k
now!
0 0 000
A. Light from the sun is reflected of the surface of each
B. Energy is released form the objects
C. Lightning is produced form these objects
D. Light is a result of friction from the gasses in the atmosphere
E. I don’t know!
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Which of the following applies to meteoroids and asteroids.
They ar
e sim
il...
They ar
e rock
y...
They ar
e compo...
They orb
it the..
.
I don’t k
now!
0 0 000
A. They are similar in size.B. They are rocky and/or
metallic.C. They are composed of
frozen gases, ice, and dust.
D. They orbit the sun in highly elliptical patterns.
E. I don’t know!
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Which of the following objects would cause the most damage if it hit the Earth?
Astero
id
Meteoroid
Meteorit
e
Meteor
I don’t k
now!
0 0 000
A. AsteroidB. MeteoroidC. MeteoriteD. MeteorE. I don’t know!
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We are learning to: identify and describe telescopes, probes, satellites, and space crafts We are looking for:telescope- refracting, reflecting, and radio are used to view distant objects
probe-machines sent to other locations in the solar system and are used to investigate/explore
satellite-orbits around the earth or other planets and are used to take photos and collect data
space craft-mode of transportation to send humans to locations in the solar system;
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We are learning to: examine advances of different people, culture, and times in astronomy.
We are looking for: examples of how telescopes have changed and
been improved over time and their impact on science and technology .
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Refracting Telescope• Refracting telescope
collects light using lenses.
• The lenses bend the light to the focal point.
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Reflecting Telescope• Reflecting telescope
uses a mirror to collect the light.
• A concave mirror bends the light inward to a focal point.
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Radio Telescope• Radio telescopes
collects radio waves.• The collector is a
concave dish.
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Observatory• The building that
houses a telescope is called an observatory.
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Other Tools of Astronomy• Telescopes have
been put into space on satellites & space stations.
• Spectrographs gather information about stars such as a star’s composition & temperature.
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Which type of telescope focuses light using a mirror?
Reflec
ting Tel.
..
Refrac
ting T
el...
Radio Tele
scop..
.
Infra
red Tele
s...
I nee
d help!
0 0 000
A. Reflecting TelescopeB. Refracting TelescopeC. Radio TelescopeD. Infrared TelescopeE. I need help!
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Which type of telescope focuses light through transparent lenses?
Reflec
ting Tel.
..
Refrac
ting T
el...
Radio Tele
scop..
.
Infra
red Tele
s...
I nee
d Help
!
0 0 000
A. Reflecting TelescopeB. Refracting TelescopeC. Radio TelescopeD. Infrared TelescopeE. I need Help!
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One of the greatest advancements in astronomy was the telescope. Which is
the correct order of advancements?
0 0 000
A. Radio- refracting-reflectingB. Reflecting – refracting –
radioC. Refracting-reflecting-radioD. Radio- reflecting-refractingE. I need help!
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Which of the following is an advantage of a space-based, satellite telescope like
Hubble?
0 0 000
A. Satellite telescopes are much closer to the stars.
B. Satellite telescopes are able to see through solid objects.
C. Satellite telescopes can detect wavelengths that are blocked by the atmosphere.
D. Satellite telescopes have the ability to see the future.
E. I need help!
0of5
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Focus Free Write (3 minutes)
Explain how the advancements in telescopes have helped astronomers learn more about the universe.
When finished, trade your paper with a partner. Revise if there are misconceptions or any incorrect information.
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09000 3 87654321520 04 98765432103 9876543210987654321021 987654321098765432100Hours Minutes Seconds
Explain how the advancements in telescopes have helped astronomers learn more about the universe.
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We are learning to: explain interstellar distances are measured in light years We are looking for: the explanation of and the use of the light year
*explain a light year as the distance light travels in a year
*explain that distances are too great to be measured in miles or kilometers
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Distances to Stars• A light year is the
distance light travels in year.
• Astronomers often use parallax to measure distances to nearby stars.
• Parallax is the apparent change in position of an object when you look at it from different places.
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A light year is a measurement of…
Distan
ce Tim
e
Speed
Accele
ration
I don’t k
now! ..
.
0% 0% 0%0%0%
a) Distanceb) Timec) Speedd) Acceleratione) I don’t know! I
need help!
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Why do astronomers measure interstellar distances in light years instead of
kilometers or miles?
Light y
ears
ar...
Mile
s and
kilo...
Mile
s and
kilo...
I don’t k
now! ..
.
0 000
A. Light years are a measure of time.
B. Miles and kilometers are too small of a unit.
C. Miles and kilometers are too large of a unit.
D. I don’t know! I need help!
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You are viewing a star that is 20 light years away. When was the light from this star
produced?
Before you w
er...
After you w
ere...
10 years
ago
2 years ag
o
I don’t k
now! ...
0% 0% 0%0%0%
a) Before you were born
b) After you were born
c) 10 years agod) 2 years agoe) I don’t know! I
need help!
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What if….there was a planet in another solar system within our galaxy that could support life. The beings on this planet have a telescope that can observe beings on Earth. If the planet is 10 light years away, who would they see as president? Use the timeline below and provide an explanation to support your answer.
After answering this question, meet with a partner to compare your responses. Collaborate to make a new paired response to the question.
1993-2001Bill Clinton
1989-1993George H.W. Bush
1981-1989Ronald Reagan
2009-2013Barack Obama
2013-2021Eugenia Green
2001-2009George W. Bush
2021-2025Cory A. Booker
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We are learning to: examine the life cycle of a star (characteristics; HR diagram)
We are looking for: a description of how stars are classified by
characteristics and then organized on an HR diagram.CharacteristicsSize- Giant, main sequence, and dwarfTemperature- blue=hot; red=coolerBrightness- apparent brightness and absolute magnitudeHR diagram shows temperature, brightness, color of stars and where the star is in its life cycle.
Used to graph the surface temperature (x-axis) vs. brightness (y-axis)
Hotter stars are on left side of graph; cooler stars on the right side of the graph
Brighter stars on top of graph; dimmer stars on bottom of graph
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Classifying Stars• Stars are classified by
size, temperature, and brightness.
• Temperature of a star is indicated by color, hot stars are blue & cooler stars are red.
• Apparent brightness is the brightness of a star as observed from earth.
• Absolute magnitude is the brightness of a star observed at the distance of 10 parsecs.
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Hertzsprung-Russell Diagram• H-R diagram is a
graph of the Milky Way galaxy.
• Surface temperature is graphed on the x-axis.
• Absolute magnitude is graphed on the y-axis.
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Types of Stars• Blue super giants have a
high brightness and high temperature.
• Red giants & super giants have a high brightness and low temperature.
• White dwarfs have a low brightness and high temperature.
• 90% of all stars appear on the Main Sequence going from the upper left to the lower right corner.
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Which characteristic of stars cause them to be different colors?
0of5
chemica
l compositi
on
distance siz
e
temperat
ure
I need help.
0% 0% 0%0%0%
a) chemical composition
b) distancec) sized) temperaturee) I need help.
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Which color would describe the youngest and hottest star?
0of5
blue re
d
orange
yello
w
I need help!
0% 0% 0%0%0%
a) blueb) redc) oranged) yellowe) I need help!
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Which star would be the brightest if all the stars are the same distance
from Earth?
Main
sequen
ce
Neutro
n Star
Red su
per g
ian...
Whit
e dwarf
I nee
d help.
0% 0% 0%0%0%
a) Main sequenceb) Neutron Starc) Red super giantsd) White dwarfe) I need help.
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How would you classify our star, the sun, on the H-R diagram?
0of5
Main se
quence
Red giant
White
dwarf
Red supergiant
I need help.
0% 0% 0%0%0%
a) Main sequenceb) Red giantc) White dwarfd) Red supergiante) I need help.
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Red Giant Main Sequence
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We are learning to: Examine the life cycle of a star and predict the next likely stage .
We are looking for: progression of the stages of a star’s life
Nebulae- cloud of gas and dust Protostar- fusion beginsMain sequence- average starGiant/red-giant- more massive starsNova/supernova - exploding starWhite dwarf- no nuclear processBlack dwarf- no heat or lightBlack Hole (area of large gravitational attraction) or Neutron
star (very dense star)
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Birth of a Star• A star begins as a
cloud of gas and dust called a nebula.
• Gravity pulls the gas and dust together into a protostar.
• A star is born when the contracting gas and dust becomes so hot that nuclear fusion begins.
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Length of Life of a Star• More massive stars
live short lives of millions of years.
• Less massive stars live long lives of billions of years.
• The sun will live for 9-10 billion years.
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During the Life Cycle of a Star• Stars fuse hydrogen
into helium during most of their lives.
• After all the hydrogen has been fused into helium, the star fuses helium into carbon, carbon into oxygen and then oxygen into iron.
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Death of a Star• Stars use up their
hydrogen and expand their atmosphere.
• Stars that are less than 1.4 solar masses will shrink to a white dwarf.
• Stars between 1.4 -3.0 solar masses will produce a supernova and leave a neutron star.
• Stars more than 3.0 solar masses will produce a supernova and collapse into a black hole.
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If given a protostar, what is the next likely stage of the star?
a) Super Giantb) Novac) Main Sequenced) Neutron Stare) I need some help
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What is the first stage of the birth of a star?
a) Protostarb) Nebulac) Giantd) Dwarfe) I need some help.
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What happens to the most massive stars as they near their death?
a) super nova to a black hole
b) super nova to a red giant
c) becomes a white dwarf
d) nothing happense) I need some help.
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What is the next likely stage of our sun?
a) White dwarfb) Black dwarfc) Red giantd) Super novae) I need help
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Focused Free Write (Pass the Pen)
• Describe the life cycle of our sun from life to death.
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We are learning to: explain that universe has billions of galaxies and are classified by shape
We are looking for: shapes of galaxies• Spiral- mix of old and new stars• Elliptical- more developed galaxies with
older stars• Irregular-newer galaxies with newer stars
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Galaxies• Galaxies are a group
of billions of stars.• Type of galaxies are
1. Elliptical2. Spiral3. Irregular
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Elliptical Galaxy• Old galaxy.• Contains red star that
are old.• No gas or dust.
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Spiral Galaxy• Middle aged galaxy.• Contains blue stars.• Has some dust and
gas.• Our Milky Way is a
spiral galaxy.
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Irregular Galaxy• Unorganized
collection of stars.• Made of very young
stars.• Has a great deal of
gas and dust.
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History of the Universe• Edwin Hubble
discovered that the farther away a galaxy is from us, the faster it is moving away from us.
• Stars moving away from us shows a red shift.
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Big Bang Theory• Big Bang Theory
suggest that billions of years ago, the universe was small, hot and dense and then the universe exploded.
• The universe formed in this enormous explosion about 10 to 15 billion years ago.
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Formation of the Solar System• The solar system
formed 5 billion years ago.
• The solar system formed from a giant cloud of gas and dust, or nebula (Nebular Theory).
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Future of the Universe• The universe may
continue to expand.• Gravity may pull the
universe back together.
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By what are galaxies classified?
a) Colorb) Temperaturec) Sized) Shape
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What type of galaxy is illustrated in the following picture?
a) Irregularb) Spiralc) Ellipticald) I have no idea.. I
need help!
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What type of galaxies contain older stars?
a) Ellipticalb) Irregularc) Barred shaped) spiral
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Type of Galaxy Elliptical
Shape of Galaxy
Spiral Irregular
(Draw Diagram)
Types of stars