Transcript March 17, 2014 - Mrs. Lamkin's Sixth Grade

Do Now: March 17, 2014
1. What are the three types of rocks?
2.How do geologists classify rocks?
3.Describe igneous rocks.
4.Describe metamorphic rocks.
5.Describe sedimentary rocks.
6.What was your favorite part of
Spring Break?
Lesson Objective:
Students will be able to
demonstrate and explain the
basic steps of the rock cycle.
Demonstration of Learning:
Students will complete a 5question exit ticket on the
steps of the rock cycle with a
minimum of 80% accuracy.
• Rocks are usually defined as a
mixture of common minerals.
• Geologists classify rocks based
on how the rocks were formed.
What are the
three types of
rocks?
Igneous Rocks
• Volcanic origin.
• Form when magma
or lava cools and
hardens.
Sedimentary Rocks
• When Earth’s
materials are
deposited in
layers and
pressed together
over time,
sedimentary
rocks form.
Metamorphic Rocks
• Metamorphic rocks are
formed deep underground
due to heat and pressure.
The Rock Cycle
• Rocks move on and under Earth’s crust
and change from one type into another
due to this movement and exposure to
heat and pressure.
Rock Cycle Starburst Lab
Step 1:
Place one sheet of wax paper on
your desk and put the unwrapped
starburst on the wax paper. DO
NOT EAT THE CANDY.
Step 2:
Label one of the starbursts “shells”,
another one “sand”, and the third
one “dirt”.
Weathering and Erosion:
• Weathering is the process where
rock is broken down into smaller
and smaller pieces.
• Erosion is when rocks and
sediments are picked up and
brought to a new location.
Step 3:
Cut the candy into small pieces.
Sediment
• At this point the candy represents
sediment.
• “Sediment” are pieces of sand or
rock.
Sediment
Step 4:
Pick up the “sediments” and
carefully push them together
to form one piece.
Silently raised
hand to tell me
what kind of
rock was formed
Sediment
Sedimentary
Rock
Compaction & Cementation
• Compaction squashes sediment
together more tightly.
• Cementation is where new
minerals stick everything
together.
Step 5:
Warm the “sedimentary rock”
in your hands for a little while.
Step 6:
Now place the warm “sedimentary
rock” on a piece of wax paper and
place the other piece of wax paper
on top followed by the book. Push
down gently.
Step 7:
Fold the rock in half and repeat
step 6.
What type of
rock was
formed?
Sediment
Sedimentary
Rock
Sediment
Metamorphic
Rock
Sedimentary
Rock
Step 8: Teacher Demo
• Place the “metamorphic rock” in the
small silicon bread pan.
• Give the bread pan to Mrs. Lamkin to
heat with you on the hot plate.
• Heat for up to 5 minuets.
• Watch and record your observations.
Sediment
Metamorphic
Rock
Sedimentary
Rock
Magma
Sediment
Metamorphic
Rock
Sedimentary
Rock
Step 9: Teacher Demo
•Set the silicon bread pan on
the wooden board on the
table.
• Observe what happens as it
cools and hardens.
What kind of
rock was
formed?
Igneous
Magma
Sediment
Metamorphic
Sedimentary
Gluing in our Rock
Cycle Diagram into
our notebooks.
Lesson
Recap