Minerals
How long does it take minerals to form?
a) days b) months c) years c) millions of years
millions of years
Rocks that are formed by heat and pressure are called...
Metamorphic rocks
When two or more minerals combine together, a __________ is formed.
Rock
What number is a diamond on the Mohs Hardness Scale?
10
The top layer of the earth is called the...
Crust
Silver and gold are both examples of...
Minerals
Rocks that form in layers are called...
Sedimentary rocks
What kind of rock can float on water?
Pumice
What is the softest known mineral?
Talc
Most of the earth's crust is made up of...
Rocks
Quartz reflect light. Which property is this fact describing?
Luster
When magma cools, it forms what type of rock?
Igneous
The only way to cut a diamond is with...
another diamond
Calcite scratches a penny, but a penny scratches calcite. How can this be possible?
They have the same hardness.
Name the two layers of the earth that are extremely hot.
The outer core and the inner core
Mineral properties include all except:
a) streak b) cleavage c) color d) size
Size
What type of rocks have animal and plant matter in them?
Sedimentary
Minerals are found in earth's ______________ and ______________.
Soil, rocks, and water.
Why is scratching glass on TV a poor way to identify a diamond?
There are hundreds of minerals that can scratch glass.
Minerals can be found in which two layers of the earth?
Crust and mantle
All are crystal shapes except:
a) hexagonal b) cubic c) triclinic d) rectangular
Rectangular
Rocks are identified by:
a) their shape b) their crystal structure c) how they were formed d) color
How they were formed
Mt. Rushmore is made out of a huge igneous rock called...
Granite
Give two reasons why diamonds are so highly valued.
luster, hardness, special meaning (love and marriage)
Coal is formed by layers of sediments. Why is coal called a fossil fuel?
Because it is made from plants that lived a long time ago.