From Rocks to Magma
Whether rock melts to create magma depends on:
Temperature: Temperature increases with depth, so melting is more likely to
occur at greater depths.
Pressure: Pressure increases with depth, but increased pressure raises the
Sedimentary Rocks and Igneous Rock Classification
Describe how sedimentary rocks form.
Describe the properties of some common sedimentary rocks.
Relate some common uses of sedimentary rocks.
Classify Igneous rocks
Sandstone is one of the common types of sedimentary rocks that form from
sediments. There are many other types. Sediments may include:
fragments of other rocks that often have been worn down into small pieces, such
as sand, silt, or clay.
Describe how metamorphic rocks form.
Describe the properties of some common metamorphic rocks.
Relate some common uses of metamorphic rocks.
Metamorphism is the addition of heat and/or pressure to existing
Minerals and Mineral Groups
Describe the characteristics that all minerals share.
Identify the groups in which minerals are classified and their characteristics.
Minerals are categorized based on their chemical composition.
Describe how melted rock produces minerals.
Describe how hot rock produces different minerals.
Explain how minerals form from solutions.
Minerals form under an enormous range of geologic conditions. There a
Mining and Mineral Use
Explain how minerals are mined.
Describe how metals are made from mineral ores.
Summarize the ways in which gemstones are used.
Identify some useful minerals.
Some minerals are very useful. An ore is a
The ores journey to becoming a useable material is only just beginning when the
ore leaves the mine. Rocks are crushed so that the valuable minerals can be
separated from the waste rock. Then the minerals are separated out of the ore. A
Types of Rocks
Define rock and describe what rocks are made of.
Know how to classify and describe rocks.
Explain how each of the three main rock types formed.
Describe the rock cycle.
There are three types of roc
Three Main Categories of Rocks
Rocks are classified into three major groups according to how they form. Rocks
can be studied in hand samples that can be moved from their original location.
Rocks can also be studied in outcrop, exposed rock formations that
Describe how igneous rocks form.
Describe the properties of some common types of igneous rocks.
Relate some common uses of igneous rocks.
Igneous rocks form from the cooling and hardening of molten magma in man