6/4/12 Rock Cycle 2
Objective:
Students will be able to model the rest of the
rock cycle using wax.
Do Now:
What will happen to the car when the hand is
removed?
1. Describe which way the car will move.
2. Tell if there is acceleration (pos. or neg.) or
constant speed.
3. Tell if the forces are balanced or unbalanced
2N
3N
Speed, Balanced and Unbalanced
Forces
•
•
•
•
•
•
Velocity = distance / time
Balanced forces are equal and opposite
Unbalanced forces are not equal
An object speeding up is positively accelerating
An object slowing down is negatively accelerating
An object going at a constant speed has balanced
forces
• An object accelerating (positively or negatively) has
unbalanced forces
• Friction is the force that acts in the opposite direction
of a moving object and slows it down.
Think/Pair/Share:
• Friday we were able to turn a
sedimentary rock into a
metamorphic rock. How did we
do this?
• An igneous rock is a rock that
forms from melted rock.
• Write/Pair/Share: How could
we turn the crayon
“metamorphic rock” into an
“igneous rock?”
• Let’s Share!!!!!
• Let’s all watch as I
put an aluminum foil
“boat” in hot water
• Be ready to make at
least 2 observations.
1. Draw the “igneous rock” and
label it igneous rock.
2. How did we turn the wax
“metamorphic rock” into an
“igneous rock”?
3. How could a “metamorphic rock”
turn into an igneous rock in real
life?
4. How could we turn the wax
“igneous rock” back into
“sediments”?
Vocabulary Box
Igneous Rock
Rock formed when melted rock (magma
underground or lava above ground) cools
and hardens.
Rock Cycle Notes
• Think/pair/share/write:
1. What are the three basic types of
rock?
• Igneous
• Sedimentary
• Metamorphic
Rock Cycle Notes
• Think/pair/share/write:
2. How are igneous rocks formed?
• Igneous rocks are formed when
melted rock cools and hardens.
Rock Cycle Notes
• Think/pair/share/write:
3. How are sedimentary rocks
formed?
• Sedimentary rocks are formed
when rock is weathered into
sediments and turned to rock by
pressure and/or natural cementing.
Rock Cycle Notes
• Think/pair/share/write:
4. How are metamorphic rocks
formed?
• Metamorphic rocks are formed
when heat and pressure changes a
rock into a new type of rock.
Rock Cycle Notes
• Think/pair/share/write:
5. Is there a set order for how rocks change
from one rock to another?
• There is no set order in the rock cycle:
any rock can turn into any other kind of
rock, or into a different type of the same
type of rock. (Example: An igneous rock
can be melted and made into a different
igneous rock.)
Igneous
Rock
Metamorphic
Rock
Sedimentary
Rock
Rock Cycle Practice
Think/pair/share:
Tell the story of how this sedimentary rock
could turn to a metamorphic rock, then to
an igneous rock.
Rock Cycle Practice
• Worksheet: Let’s do the first one
together!
• Finish the rest of the worksheet
• Notice that for the last few “rock
strips” you get to pick the types of
rock.
Vocabulary Box
Rock cycle:
The ways that the earth’s materials
change from one rock type to another in
no particular order.
(any type of rock can become any other
type of rock)
6/4/12 Exit ticket
…could
Tell how this
become a
sedimentary
metamorphic
rock…
rock.