Warm Up: Rocks are classified by how they formed. The three types are:

• Igneous rocks form from cooling magma or lava.

• Sedimentary rocks form from the bonding of rock fragments such as sand, silt, or clay; from organic materials; and from chemicals dissolved in water.

• Metamorphic rocks form when other rocks are changed by heat and pressure.

In which type of rock would you expect to find each of the following?

Part 1: Classify rocks as igneous, sedimentary, or metamorphic.

The three groups of rocks each have unique characteristics. For example, many igneous rocks have a texture of interlocking mineral crystals. Sedimentary rocks may have distinct layers of sediments, known as strata.

To learn other characteristics of igneous, metamorphic, and sedimentary rocks, turn on Show common characteristics in the CHARACTERISTICS pane.

Match each rock type to its common characteristics.

Move your cursor over the rock pictures. Based on what you see, classify the rocks by dragging them into the correct box on the CHARACTERISTICS tab. Click on Status to check your answers.

Once you have successfully classified each rock, put each rock below into the appropriate category.

Drag the rocks from the SIMULATION pane to the correct positions on the LOCATION tab. Click on the Status check box to check your placements as you go.

Each rock is labeled with a letter when you put your cursor on it. Record your findings by sorting the rock samples into the appropriate area.

Hint: there are 4 samples per type

In your own words, compare igneous, sedimentary, and metamorphic rocks.

Categorize the characteristics of extrusive and intrusive igneous rock