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.

http://www.fi.edu/fellows/fellow1/oct98/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.

http://www.fi.edu/fellows/fellow1/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.

http://www.fi.edu/fellows/fellow1/oct98/create/metamorph.htm

Igneous

Sedimentary

Met

amorp

hic

Rock Cycle Diagram

ENGAGE

A rock can be a thing of beauty.

Photos by

Sandra Woodruff

•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

EvaluateDraw Your Own Rock Cycle

Use the words below. The words may be used more than once.

Igneous Rock Melting Lithofication

Sedimentary Rock Magma Cementation

Metamorphic Rock Cooling Compaction

Heat and Pressure Pressure

Weathering & Erosion Sediments