Minerals
Which mineral characteristic is the LEAST reliable?
Color
What do we call mineral deposits that are mined from underground?
Land won ore
Igneous rocks form from the cooling of either _____ or _____.
Magma, lava
What two factors are needed for metamorphic rocks to form?
Heat & pressure
Rank the following from largest to smallest: silt, sand, clay
Sand, silt, clay
Moh's Scale of ___________
What do we call mineral deposits harvested from under the ocean?
marine won
Rocks with no visible crystals have cooled ________.
Rocks with large crystals have cooled ________.
very quickly
slowly
What's the word that describes a metamorphic rock with bands of minerals?
Foliated
Another name for a soil layer
Horizon
Which mineral characteristic is found using a porcelain plate to find the inside color of a mineral?
Streak
Name two minerals that we'd find in a quarry.
sand, gravel, rocks
What igneous texture has mineral crystals of two different sizes because of two different cooling rates?
Porphyritic
What's the difference between physical and chemical weathering?
Physical - breaking rocks into smaller pieces without changing chemical composition
Chemical - Changing the rock's composition through chemical reaction
What is erosion?
Movement of weathered materials
What are the hardest and softest minerals?
Hardest - Diamond
Softest - Talc
Name two minerals we'd find in a mine.
Gold, copper, iron
Rank the following from highest silica content to lowest silica content.
Mafic, Felsic, Intermediate, Ultramafic
Which type of sedimentary rock is formed when mineral fall out of solution, leaving sediment behind? (chemical, organic, or clastic)
chemical sedimentary rock
What happens to the eluviation layer?
Nutrients & minerals get stripped out and taken to lower layers
Name the characteristics that all minerals must have (Hint: Solid)
Solid
Naturally Occurring
Inorganic
Definite Chemical Composition
Unique Internal Structure
Name two things we can do to help preserve our mineral resources.
1. recycle materials and products that already contain minerals
2. encourage more sustainable use of mineral deposits
Name one example of a coarse grained igneous rock, and a fine grained (glassy) igneous rock.
Answers will vary
What processes cause sediments to stick together to form a sedimentary rock?
Compaction & cementation (lithification)
The Dust Bowl was an example of which type of wind erosion?
Suspension