Question

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.
Sedimentary rocks
Formed from cooled magma. Texture of interlocking crystals with no layering or color banding. Some igneous rocks contain small holes or vesicles
Metamorphic rocks
Formed of particles such as pebbles, sand, silt, or clay cemented together. May contain fossils. Often form in layers.
Igneous rocks
Formed from rocks transformed by heat and/or pressure. Interlocking crstal texture often shows foliation (layewrs) or alternating light and dark bands.

Answer 1

Here’s the classification of the rocks according to their common characteristics:

**Sedimentary rocks:**
- Formed of particles such as pebbles, sand, silt, or clay cemented together.
- May contain fossils.
- Often form in layers.

**Metamorphic rocks:**
- Formed from rocks transformed by heat and/or pressure.
- Interlocking crystal texture often shows foliation (layers) or alternating light and dark bands.

**Igneous rocks:**
- Formed from cooled magma.
- Texture of interlocking crystals with no layering or color banding.
- Some igneous rocks contain small holes or vesicles.