Download Lithospheric

Tuesday, January 27, 2015
8:10 – 8:40
SCIENCE TIME
8:40 – 9:20
The Lithosphere
The outer part of the earth, consisting
of the crust and upper mantle,
approximately 100 km (62 mi.) thick.
http://studyjams.scholastic.com/studyjams/jams/science/rocks-mineralslandforms/lithosphere-hydrosphere-atmosphere.htm
Crust – Mantle - Core
Hardest & Hottest! – 6000+ degrees Celsius
About 2900 KM thick!
Science Binder Pages
The Layers of the Earth
© Copyright 2006. M. J. Krech. All rights reserved.
The Four Layers
The Earth is composed of
four different layers. The
crust is the layer that you
live on, and it is the most
widely studied and
understood. The mantle is
much hotter and has the
ability to flow. The outer
core and inner core are
even hotter with pressures
so great you would be
squeezed into a ball
smaller than a marble if
you were able to go to the
center of the Earth!
The Crust
The Earth's Crust is like
the skin of an apple. It is
very thin in comparison
to the other three layers.
The crust is only about 35 miles (8 kilometers)
thick under the oceans
(oceanic crust) and about
25 miles (32 kilometers)
thick under the
continents (continental
crust).
The Lithospheric Plates
The crust of the Earth is broken into many pieces called
plates. The plates "float" on the soft, semi-rigid
asthenosphere.
The Lithosphere
The crust and the upper layer of the mantle
together make up a zone of rigid, brittle rock
called the Lithosphere.
The Crust
The crust is composed of two rocks. The continental crust
is mostly granite. The oceanic crust is basalt. Basalt is
much denser than the granite. Because of this the less
dense continents ride on the denser oceanic plates.
The Mantle
The Mantle is the
largest layer of the Earth.
The middle mantle is
composed of very hot
dense rock that flows like
asphalt under a heavy
weight. The movement of
the middle mantle
(asthenosphere) is the
reason that the crustal
plates of the Earth move.
Convection Currents
The middle mantle
"flows" because of
convection currents.
Convection currents are
caused by the very hot
material at the deepest
part of the mantle rising,
then cooling and sinking
again --repeating this
cycle over and over.
Convection Currents
The next time you heat anything
like soup or water in a pan you
can watch the convection currents
move in the liquid. When the
convection currents flow in the
asthenosphere they also move the
crust. The crust gets a free ride
with these currents, like the cork
in this illustration.
Safety Caution: Don’t get your
face too close to the boiling
water!
The Outer Core
The core of the
Earth is like a ball
of very hot metals.
The outer core is
so hot that the
metals in it are all
in the liquid state.
The outer core is
composed of the
melted metals of
nickel and iron.
The Inner Core
The inner core of the
Earth has
temperatures and
pressures so great
that the metals are
squeezed together
and are not able to
move about like a
liquid, but are forced
to vibrate in place
like a solid.
The End
Pair Up and answer
this question:
Have we ever seen
part of the Mantle?
Explain.
© Copyright 2006. M. J. Krech. All rights reserved.
Hands
On
Activity!
Vocabulary Activity – Imagine That!
Close your eyes and imagine:
After designing a super drill your goal was
to dig through the Lithosphere. You kept
digging until you thought you would reach
China. You couldn’t believe the depth of the
hole. It was a tunnel!
Think-Pair-Share:
• What makes up the Lithosphere?
• If continued drilling down to the outer core, about
how many kilometers would you have gone?
What’s the hottest and
hardest layer at the center
of the Earth called?
inner core
What is the crust and
upper mantle called?
lithosphere
Review Science Workbook
Chapter 8 pages 174 - 177
Homework Pages 178-181
Restroom
Break
9:20 – 9:30
Math Time!
FACEing
Math x 2
Finish todays for homework and one
from Friday (if not already finished)
MOVE TO
LEARN
http://www.movetolearnms.org/how-do-ido-it/fitness-videos-4-6/cranium-corral/
Out of Classroom!
• 12:00 – 12:45 Activity
• 12:45 – 1:15 Lunch
• 1:15 – 1:45 Recess
Writing Time!
Expository Nonfiction
W52 – write informative/explanatory texts
1:45 – 2:40
Text Structure
• When you read
informational text notice
the text structure. This
will help you understand
and remember the
information better.
• When you write
informational text, think
about which text structure
would best organize your
information so your
reader can understand
and remember.
Text Structure Review
What is text structure?
• The way authors organize facts to help
readers understand informational text.
In-Class Magazine Project
You must
use your
time
wisely!!
3 Text Structure Examples for
Magazine Project
3 More Text Structure Examples
for Magazine Project
In-Class Magazine Project
Today –
Choose
Topic!!
Station
Rotation B!
2:40 – 3:10
3:10 – 3:15 Wrap Up!
• Pack-Up
• Office will announce:
Car Riders – Leave around 3:15
Bus Riders – Teacher walks out about 3:22
(listen to intercom-dismisses by grade)