Chapter 7 Rocks and Soil

One way to tell rocks apart is by looking at the size of the bits of minerals that make up each rock.  What is this physical property called?

• color
• luster
• texture

How is metamorphic rock formed?

• Pressure over time binds sediments into rocks.
• Heat and/or pressure change the minerals into a new rock.
• A hot mixture of gases and minerals cools to form rock.

Look at the image.  What type of rock is shown?

• Shale
• Igneous
• Sedimentary

What mineral is crushed and ground into salt that is used to season food?

• halite
• quartz
• fluorite

Which two properties would be best to use to identify a mineral?

• shape and luster
• size and magnetism
• hardness and streak

What is rock called that is formed from bits of rocky matter that settle to the bottom of rivers, lakes, and oceans?

• shale
• igneous
• sedimentary

Which particles found in soil are the smallest?

• silt
• clay
• sand

What layer of soil includes rock particles mixed with the dark products of decay?

• silt
• clay
• topsoil

Look at the image.  In which layer will the oldest fossils most likely be found?

• A
• B
• C
• D