Earth History

How are Sedimentary Rocks formed?

• Cooling and Hardening
• Heat and Pressure
• Compacting and Cementing
• Melting

Where can the oldest layer be found?

• The top layer
• The middle layer
• They are all the same age
• The bottom layer

What must be present for Fossil Fuels to form?

• Bones and Sediment
• Dead Organisms and Layers of Sediment
• Dead Organisms, Layers of Sediment, and Heat & Pressure over time
• Bones, Layers of Sediment, and Heat & Pressure over time

Some students made a model to show one of the first steps in the formation of sedimentary rock.  The students pour 2 cm of light-colored sand into a clear plastic box.  Then they add 1 cm of gravel.  Finally, they pour 2 cm of dark-colored sand on top of the gravel.  Which characteristic of sedimentary rock does this model best show?

• Sedimentary rock is made of layers.
• Sedimentary rock is cemented bits of rock.
• Sedimentary rock is often limestone.
• Sedimentary rock is common in Texas.

Some students made a model to show one of the first steps in the formation of sedimentary rock.  The students pour 2 cm of light-colored sand into a clear plastic box.  Then they add 1 cm of gravel.  Finally, they pour 2 cm of dark-colored sand on top of the gravel.  Which characteristic of sedimentary rock does this model best show?

• Sedimentary rock is made of layers.
• Sedimentary rock is cemented bits of rock.
• Sedimentary rock is often limestone.
• Sedimentary rock is common in Texas.

How are igneous rocks formed?

• oats and notes
• magma and lava
• bread and water
• just don't know