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Launch Unit: Geology on Mars
Chapter 1: Comparing Earth and Rocky Planets
Earth, Mars, and other rocky planets can be thought of as
systems.
These systems are made up of interacting spheres that can
include the
geosphere, atmosphere, hydrosphere, and biosphere.
When landforms on different rocky planets look similar, it is
evidence that
they may have been formed by the same geologic process.
A planet is habitable if it can support life. Scientists think a
planet needs liquid water and an energy
source (such as the sun) to support life.
Planetary geologists study rocky planets by comparing them to
Earth because we know more about Earth
than we know about Mercury, Venus, or Mars.
Science is both a body of knowledge and the processes and
practices used to add to that body of
knowledge.
Science assumes that objects and events in natural systems occur
in consistent patterns that are
understandable through measurement and observation.
Scientists ask questions about the natural world and develop
claims, or tentative answers, based on
evidence.
Scientists use reasoning to explain how the evidence supports
their claim.
Scientists make scientific arguments using claims, evidence, and
reasoning.
Scientists can use models to test their ideas and get evidence
about natural processes in the natural world
that are difficult to observe but models are not exactly the
same.
Some models are more useful “To Scale” and other times “Not to
Scale”.
Landforms can provide evidence about the past because they
remain after the geologic processes that
formed them stop happening.
Scientists evaluate how convincing evidence is when they
construct arguments. Ex. models vs. pictures
Evidence can support or go against a claim.
A convincing scientific argument is supported by evidence and
the process of reasoning.
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Mars may have been habitable in the past because it has an
energy source (the sun) and there is evidence
that Mars once had liquid water.
UNIT 1 Plate Motions
Key Concepts
Earth’s outer layer is made of hard, solid rock
Earth’s outer layer is divided into sections called plates.
Geologists look for patterns in landforms and in geologic events
in order to better understand Earth.
The plates of Earth’s outer layer move.
Earth’s plates move on top of a soft, solid layer of rock called
the mantle.
Rocks can be hard solids or soft solids
At divergent plate boundaries, rock rises from the mantle &
hardens, adding new solid rock to the edges of
both plates.
At convergent plate boundaries, one plate moves underneath the
other plate and sinks into the
mantle.
Multiple lines of evidence can be used to draw a conclusion or
to make a convincing argument.
Scientists analyze data in order to come to conclusions.
Geologists examine patterns on Earth's surface in order to
confidently make claims about what geologic
processes are happening.
Multiple pieces of evidence suggest that the plate boundary
between the South American Plate and African
Plate is divergent.
Earth’s plates travel at a rate too slow to be experienced by
humans & takes a long time to move great
distances.
GPS technology is used to accurately measure the small distances
that plates move.
Reasoning, the process of making clear how your evidence
supports your claim, is an important practice in
science
Scientists apply what they know about how things work in one
situation to explain how they will work in other
similar situations.
Scientists must carefully consider all available evidence before
making arguments about a phenomenon.
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Discussing evidence and ideas with others helps build new
understanding.
Scientists can change their minds when presented with convincing
evidence.
That to be convincing, a written scientific argument needs to
state a claim, describe specific evidence, and
explain how the evidence supports the claim.
Facts to study and know/Practice
NAME Movement Features
Divergent Boundary
Plates move in different directions or apart
Sea Floor Spreading mid-ocean ridges making
new crust earthquakes
Rift Valleys
Earthquakes Volcanoes mountains
Convergent Boundary
Two plates come together or move towards each other
subduction deep ocean trench volcanoes earthquakes
Transform Boundary
The plates are sliding past one another.
Earthquakes (think of the San Andreas Fault),
What is happening at location “A” in the picture to the right?
(include crust & boundary type and feature created) This is a
mid-ocean ridge where new crust is being formed. This pushes the
plates apart creating a divergent plate boundary.
What is happening at location “C” in the picture to the right?
(include crust & boundary type and feature created) This is a
subduction zone where two lithospheric plates are converging. A
deep ocean trench is created along with earthquakes and
volcanoes.
What feature created by the tectonic plates moving do we live
in? We live in a Continental Rift Valley called the Rio Grande Rift
Valley.
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Earth’s outer layer is made out of hard, solid rock, no matter
if it is continental or oceanic crust.
Patterns on this map tell us that . . . This pattern shows us
that Earthquakes and volcanoes often occur at plate boundaries.
Dr. Bailey and his team are studying two plates that are far
apart from each other. However, these two plates used to be next to
each other. Which diagram shows what Dr. Bailey and his team would
find between these plates?
Diagram A. At divergent plate boundaries magma rises up, adding
rock to the edges of both plate. Diagram B is not correct because
there are not plates under plates. Diagram C is not right because
sand and dirt do not fill in the gap. Diagram D is not correct
A team of researchers has been using GPS data to track two
plates that are moving toward each other. Which diagram shows what
is happening at the place where the plates are moving toward each
other?
At convergent plate boundaries one plate gets pushed (subducted)
underneath the other plate, into the mantle (magma) below.
Fossil remains of Cynognathus (an extinct large-bodied animal)
have been discovered in Argentina & South Africa. When they
were living, all the Cynognathus lived together on land, and they
could not swim. However, now there is an ocean between the
Cynognathus fossils. What could explain how these fossils got so
far apart? There must be a divergent plate boundary between the
plates. Ove a long time (millions of years) the land got separated.
Since the fossils are in the land, the fossils got separated.
Engineering Design The Design Cycle is a process used by
scientists and engineers to create solutions that address specific
goals or
criteria.
The design cycle has four main steps: plan, build, test, and
analyze. These steps form a cycle that repeats.
Typically, you begin with plan. In this stage, you think about
your criteria and make a plan for a design that
meets those criteria.
On the build step, you actually start creating your design.
Once the design is built, you test it.
The test results give you information about how well your design
works.
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Next, on the analyze step, you examine your test results.
o How well did your design measure up to your criteria?
o Here you figure out whether there are areas that need
improvement.
Finally, you’re back at plan.
This is when you think about what you can change in your design
to better meet the criteria.
You will go through the full cycle over and over until you have
addressed the criteria as effectively as possible.
Just remember your goal is to improve your design each time you
move through the cycle.
Unit: Rock Transformations
Key Concepts
Three types of rock: sedimentary, igneous, and metamorphic.
Rocks can form in different ways. This causes them to be
different types.
Matter gets transformed by energy, but the same matter is still
present
Any rock can become magma or sediment.
Sediment forms when any type of rock is weathered, a process
driven by energy from the sun.
Magma forms when any type of rock is melted, a process driven by
energy from Earth’s interior.
When sediment is compacted and cemented together, it forms
sedimentary rock.
When magma cools, it hardens to form igneous rock.
When any rock is exposed to heat and/or pressure, it will form a
metamorphic rock.
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Plate motion moves rock formations.
Subduction moves rock down, below Earth’s outer layer.
Uplift moves rock upward toward Earth’s surface.
Uplift and subduction can expose rock formations to different
energy sources, which can transform them.
Weathering is a complex process, which results in wind and water
breaking down rock into sediment.
Erosion is the process of moving water and wind, carrying
sediment, downhill to a low point in the landscape
where it accumulates.
Energy drives the processes that transform rock.
Any type of rock can transform into any type of rock because of
plate motion.
Energy from different sources leads to different types of rock.
Energy inside Earth melts rock into liquid rock,
but energy from the sun causes rock to weather into small pieces
of rock.
Could the material from igneous rock come from sedimentary rock?
Yes, if sedimentary rock is moved below
Earth’s outer layer and exposed to energy from Earth’s interior,
it can melt into liquid rock and form igneous
rock.
How did material from the rock formations turn into sand? Wind
and rain interacted with the rock, breaking it
into small pieces.
Is it possible that material from an igneous rock formation
could ever form sedimentary rock on Earth’s
surface? Yes, if igneous rock is moved to Earth’s surface and
exposed to energy from the sun, it could weather
into small rock pieces that could form sedimentary rock.
Facts to study and know/Practice
Look at the rock layers to the right.
Which layer is the oldest? ___Layer 5______ Which layer is the
youngest? ___Layer 1______ Which type of age dating are you using?
_Relative___ AGE DATING How did you determine which layer was the
oldest and what do you call that? LAW OF ___Super
Position__________ ABSOLUTE AGE DATING is the age of a rock or
fossil given as the ___number___of years since it was formed.
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
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How did the two layers labeled
“Pennsylvanian” become separated?
The one at the top of the Sandia
mountains was uplifted.
Could the bottom layer labeled
“Pennsylvanian” ever become weathered
and broken into sediment?
Yes, the one under all the other layers
could become weathered and broken
into sediment if that rock is ever
exposed at the surface. Weathering
happens at the surface, because it is
driven by energy from the sun.
Dependent/Responding Variable - The variable that is being
measured (data
collected) & may or may not be affected by the changed
variable.
Independent/Manipulated Variable - The one variable that is
changed on
purpose in an experiment.
Identify the Independent/Manipulated Variable: (Think MIX)
X-axis label, M
stands for Manipulated, I stands for Independent _# of
students__
Identify the Dependent/Responding Variable: (Think DRY) Y-axis
label, D stands
for Dependent, R stands for Responding __Favorite Color _
Matter is anything that has mass and takes up space.
All matter is made up of tiny little particles known as atoms
and molecules.
Earth, Moon, Sun Unit
Key Concepts
The Moon does not make its own light; the sun illuminates the
Moon.
When a model is “to scale,” object sizes and distances are
larger or smaller
than in the real world but the same relative to one another.
Some models
need to be “not to scale” to be useful.
D R Y
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The sun illuminates the half of the Moon that is facing it, and
the other half is dark.
Light from the sun travels in straight lines.
From Earth we can only see the half of the Moon that is facing
us.
Because the Moon moves to different positions around Earth, we
see different amounts of the illuminated
half of the Moon. This is why we see different phases of the
Moon.
There is a pattern to the position of the Moon because the Moon
orbits
around Earth.
It takes about one month for the Moon to orbit Earth, so it
takes about one
month to see the full pattern of moon phases. This pattern
repeats with every
orbit of the Moon.
During a lunar eclipse, the Moon is completely dark because
Earth blocks sunlight from hitting the Moon.
Lunar eclipses can only happen when Earth is in between the sun
and the Moon.
Lunar eclipses do not happen every time Earth is in between the
sun and the Moon.
The Moon is only completely dark when the sun, Earth, and the
Moon are in
a straight line, with Earth in the middle.
A solar eclipse occurs when the moon gets between Earth and the
sun, and
the moon casts a shadow over Earth. A solar eclipse can only
take place at
the phase of new moon, when the moon passes directly between the
sun
and Earth and its shadows fall upon Earth's surface.
Facts to study and know/Practice
Earth rotates (spins) on its axis. One rotation equals 24 hours
or 1 day.
The Moon also rotates on its axis, but much slower than Earth’s
rotation.
It takes the moon 27.3 Earth days to make one rotation on its
axis.
It takes the same amount of time (27.3 Earth days) to also orbit
around Earth.
Astronomers made two observations of the Moon that were several
days apart. Their observations are shown in the
diagram above. The light part of the Moon appeared to get larger
over time. Why did this happen?
The moon orbits Earth. The moon is always half illuminated. We
are seeing different parts of the illuminated
half at different angles as it orbit Earth.
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Use the diagram to the right to identify the different phases
of
the moon. (Remember, the key is to locate the sun first)
Which moon is the full moon? #5 Which moon is the new moon? #1
Waxing side (growing) #’s 2, 3, 4 Waning side (shrinking) #’s 6, 7,
8
A lunar eclipse occurs during a Full Moon when the Earth’s
shadow does fall
on the moon.
A solar eclipse is when the Moon’s shadow falls on Earth. This
occurs during
a New Moon and during the rare times that the tilt of the Moons
orbit is
aligned with Earth’s orbit.
The diagrams above show Earth and the Moon in different
positions, as seen from above (top view). Sunlight is coming
from the left, but these diagrams do not show what parts of
Earth or the Moon are light or dark. Could the half of the
Moon that faces Earth ever be completely dark in any of these
diagrams?
Diagram 3. Yes, it is possible because Diagram 3 is a New Moon,
which appears completely dark from Earth.
Three students made the diagrams above to show what they think
the Moon looks like when it is seen from above (top
view). In these diagrams, the sunlight is coming from the left,
as shown by the arrows. Which diagram is accurate and
why?
Diagam C is accurate because half of the moon is illuminated. It
has to be the side facing the sun,
Diagram A is wrong because the moon is completely dark. Diagram
B is wrong because the moon is
completely illuminated.