LT: I am learning how convection current works. The
purpose is to identify how particle movement affects
the mantle. Today I will learn how convection current
cycles within the mantle.
Warm-up: What is an example of convection currents
happening in your life?
CW: Use notes and demo to explain
how the mantle flows.
HW: Complete
“How the mantle flows” descriptive
writing page.
O Lithosphere: The outer part of the earth,
consisting of the crust and upper mantle,
approximately 62 mi. thick. The solid portion of
the earth.
O Asthenosphere:
The upper part of
the Earth's mantle,
extending from a
depth of about
46.5 mi to about
124 mi. The
asthenosphere lies
beneath the
lithosphere and
consists of partially
molten rock
Correct questions from
reading 1.2
O
The movement of energy from a warmer object to a cooler object is called?
The movement of energy from a warmer object to a cooler object is called heat transfer.
O
What is convection?
Convection is heat transfer by the movement of currents within a fluid these heated
particles of fluid begin to flow transferring heat from one part of the fluid to another.
O
Heat transfer by convection is caused by differences of ? and density within a
fluid.
Heat transfer by convection is caused by differences of temperature and density
within a fluid.
O
A measure of how much mass there is in a volume of a substance is?
Density is a measure of how much mass there is in a volume of a substance.
Correct questions from
reading 1.2
Circle the letter of the sentence that describes what happens to a fluid when its
temperature increases.
a. Its particles occupy less space.
b. Its density decreases.
c. Its particles move more slowly.
d. Its particles settle together more closely.
O
When temperatures increases in a fluid the particles density decreases.
O
What three factors set convection currents in motion?
The three factors that set convection current into motion are the 1) heating and
cooling of liquid, 2) the changing of fluid’s density and 3) the force of gravity .
O
What happens to convection currents when the liquid or gas is no longer heated?
When liquid or gas are no longer heated in convection current the flow
will stop and the current will eventually disappear.
Before we go on what is
density?
The amount of particles within a given space/
amount of volume.
This particle arrangement is
more dense or less dense?
MORE
This particle arrangement is
more dense or less dense?
LESS
This particle arrangement is
dense increasing or decreasing?
increasing
This particle arrangement is
dense increasing or decreasing?
decreasing
8. Complete the graphic organizer to show the relationships
among heat, movement, and density in mantle rock.
A. Particles occupy
less space.
B. Particles move
less and density
increases.
C. Particles occupy
more space.
D. Mantle rock is
being heated.
E. Particles move
more and density
decreases.
Correct questions from
reading 1.2
O Why is convection current within the mantle shown as a
cycle?
Convection current within the mantle is shown as a cycle
because the flow of hot magma rises and once cooled this
magma sinks and the process starts all over again due to
the heat of the outer core.
O Is the following sentence true or false? Explain your
reasoning to support your answer.
O The heat source for the convection currents in the
mantle is the sun.
Convection Current
O A convection current is the flow that
transfers heat within a fluid.
Convection currents are located in the
asthenosphere in boiling water and lots
of other places..
Vocabulary words you should know
O
O
O
O
O
O
O
O
O
O
O
Plate Boundaries
Plate Tectonics
Earthquake
Volcano
Continental Crust
Oceanic Crust
Mantle
Inner Core
Outer Core
Lithosphere
Asthenosphere
HW: write a clear description of “How the Mantle
Flows”. You should use as many words from the word
bank. Your writing should be organized, chronological
and neat. Any questions?
How the Mantle Flows
_________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
Word Box
Mantle
Outer Core
Particles
_____________________________________________________________
Lithosphere
Continental Crust Oceanic Crust Gravity
Convection current
Density decreases
Flow
_____________________________________________________________
Rise
Density increases Sink
_____________________________________________________________
Temperature
Asthenosphere
Less space
_____________________________________________________________
Heating and cooling More space
LT: I am learning how convection current works. The
purpose is to identify how particle movement affects
our lives. Today I will learn how convection current
cycles.
Warm-up: Describe the atoms within the demonstration by
using a science sentence. (Beginning, middle, and end)
CW: How does a lava lamp flow?
HW: Complete the
Sematic Feature Analysis
of the mantle and a
lava lamp sheet.
How does a lava lamp work?
Write down the different parts of
the lava lamp you see…
Think:
What causes the “Mantle - lava” to
cycle within the earth, within a lava
lamp?
On your lava lamp paper create
and explain the convection current
flow of solutions.
Use the following partial arrangement
descriptions to describe your lava lamp.
• Greater distance between partials
• Reduced distance between partials
• Rises – goes up
• Sinks- goes down
• Density increases
• Density decreases
• Occupies more space
• Occupies less space
• Increases energy
• Decreases energy
• Heats up
• Cools down
• Has gravitational force
• Closest to a heat source
• Furthest from a heat source
•
Assignment:
Complete the Semantic Feature Analysis
of the mantle and a lava lamp. If you have
a question on a row just place a “?”
question mark there and we will discuss it
tomorrow.
Please do not guess ….. If you do not
know we will work on it tomorrow…. We
need to understand how and why!!!
When particles occupy little space
When particles occupy more space
When particles move real fast
When particles move real slow
At the top of the mantle
At the bottom of the mantle
At the top of a lava lamp
At the bottom of a lava lamp
Convection Current is…..
Furthest from a heat source
Closest to a heat source
Has gravitational force
Cools down
Heats up
Decreases energy
Increases energy
Occupies less space
Occupies more space
Density decreases
Density increases
Sinks - goes down
Rises - goes up
Reduced distance between particles
Greater distance between
particles
Directions: Complete the matrix by using an “X” within the rows of features that apply to each concept. Concepts of particle arrangement, mantle and lava lamp positions are found on the left.
LT: I am learning how convection current works. The
purpose is to identify how particle movement affects
our lives. Today I will synthesize how convection
current affects the lithosphere.
Warm-up: What are the forces you remember
applying to your milky way bar? ..
CW: Lithosphere
and convection current
HW: complete writing
The lithosphere and convection current.
Why do particles space out?
Why do particles come close together?
Why do particles rise?
Why do particles sink?
Where is the most energy?
Where is the least energy?
What does energy do to atoms?
The lithosphere and convection current.
Hot Chocolate Mantle Convection
Demonstration
What is the hot chocolate?
How did the hot chocolate change?
What caused the hot chocolate to move?
Assessment writing
Write an explanation of how the lava lamp and Earth layers are
similar. Explain what the convection current is and how
convection current affects the lithosphere. These answers should
be very detailed and clear and come up with as many
comparisons as possible. You can also include ways that the two
are different.
Mantle
Outer Core
Lithosphere Particles
Continental Crust
Oceanic Crust Gravity
Flow
Convection current
Density increases
Sink Rise
Density decreases
Asthenosphere Temperature
Heating and cooling
More space
Less space
Increase Energy
Decrease energy
Density decreases
Density increases
Particles occupy less space
Particles occupy more space
Gravitational force
Closest to a energy source
Farther from a energy source