3.1 – The Rock, Carbon and Nitrogen Cycles

Videos http://www.youtube.com/watch?v=K8dDq3el_tQ http://www.youtube.com/watch?v=v3yJArifULo http://www.youtube.com/watch?v=R8- E6cDCr5U&feature=fvwrel

Do Now What are the three major types of rocks?

Do Now What are the three major types of rocks? Sedimentary Metamorphic Igneous

Key Words Alternate Internal External Photosynthesis Respiration Biomass Decompose Key Words

Vocab Words Igneous Rock Sedimentary Rock Metamorphic Rock Magma Lava Weathering Vocab Words

Why Study Rocks? All processes such as volcanic eruptions, mountain building, weathering, erosion, and even earthquakes involves rocks and minerals. A basic knowledge of rocks is essential to understanding the Earth.

Rocks Any solid mass of mineral or mineral-like matter that occurs naturally as part of our planet. A few rocks are composed of just one mineral. Most are mixtures of minerals. A characteristic of a rock is that each of the component minerals retains their properties in the mixture. A few rocks are are composed of nonmineral matter. Ex: Coal – consists of organic matter. Classified into three groups: Igneous Metamorphic Sedimentary

The Rock Cycle Interactions among Earth’s water, air, and land can cause rocks to change from one type to another. The continuous processes that cause tocks to change make up the rock cycle. Most changes in the rock cycles take place over long periods of time.

Magma vs. Lava Magma is molten rock deep beneath Earth’s surface. Lava is magma that reaches Earth’s surface.

Alternate Paths When rocks do not follow the typical rock cycle, they tend to follow an alternate pathway. Igneous rocks that never reach the surface and undergo heat and pressure and become metamorphic rocks. Metamorphic rocks that undergo weathering and erosion on the surface and become compacted and cemented to become sedimentary rock. Sedimentary rocks that never get pushed below the surface and undergo weathering and erosion on the surface and become compacted and cemented to become sedimentary rock once again.

Energy Energy that drives the rock cycle come from above and below. Processes driven by heat from Earth’s interior are responsible for forming both igneous and metamorphic rocks. Weathering and the movement of weathered material are external processes powered by the energy from the Sun; producing sedimentary rocks.

Group Activity Looking at page 67, Figure 2 (The Rock Cycle) copy down the diagram and label everything. Put them in your folders when you are done.