06 8 12a rockcycle

TAKS Objective 5
The student will demonstrate an
understanding of earth and space
systems.


TEKS Objective: 8.12
The student knows that cycles exist in Earth
systems. The student is expected to
A

analyze and predict the sequence of
events in the lunar and rock cycles.


Prior Knowledge
• TEKS 6.6 C – Students identify
forces that shape the feature of the
earth including uplifting, movement
of water, and volcanic activity.
• TEKS 7.14 B – Student analyze
effects of regional erosional
deposition and weathering.


Learning Objectives
The student will be able to predict the events in the rock
cycle.
The student will be able to diagram and explain the rock
cycle.

All rocks are heavy.
True or False


A heavy piece of rock?

Think again!


All rocks are hard.
True or False


False

• Chalk
• Pumice
• Talc


Rocks never change.
True or False


False

• Rocks are changed by
processes such as:

– Melting
– Pressure
– Heat
– Weathering and Erosion


Teacher Background


Igneous rocks are formed when magma
cools.
/>create/igneous.htm


Melting


Sedimentary rocks are formed when
layers of earth have been deposited in
the bottoms of bodies of water. Over
time these layers are pressed together
forming sedimentary rocks.
/>1/oct98/create/sediment.htm


Weathering and Erosion


Metamorphic rocks were once
sedimentary or igneous rocks that have

been placed under tons of pressure and
heat.
/>/create/metamorph.htm



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Sedimentary


Rock Cycle Diagram


ENGAGE

Photos by
Sandra Woodruff

A rock can be a thing
of beauty.


•Explore

Explore

Chocolate Rocks!


 Explain
• How did you simulate weathering
and erosion?
• How are sedimentary rocks
formed?
• How are metamorphic rocks
formed?
• How are igneous rocks formed?


Elaborate
Rock Cycle Pictures and Arrows