Event Rules
50 mintues
How long is the event
A solid, naturally occurring material made of one or more minerals.
what is Rock
What is the physical property that measures how easily a mineral can be scratched?
What is hardness
A mineral scratches a copper penny but not glass. What does this tell you about its hardness
What is the hardness between 3 and 5.5 on the Mohs scale
Identification Classification
what is the rock topic tasks for the event
Rock formed by the cooling and solidification of magma (underground) or lava (surface).
what is igneous rock
What is proptery that describes how light reflects off the surface of a mineral?
What is Luster
Two Minerals are the same color, but one leaves a white streak, and the other leaves a reddish-brown streak. What can we conclude?
They are different minerals
One magnifying glass, one three ring binder, one class II calculator, and notes
WHat is the materials you can bring
Rock formed from the accumulation, compaction, and cementation of sediments.
what is Sedimentary Rock
Property is more reliable than color when identifying a mineral because it shows the mineral's true color
What is a streak
A mineral breaks into flat sheets every time it is struck. Which Property is being used, and why is it useful for identification
What is cleavage;It helps identify minerals because cleavage patterns are consistent.
Where possible, participants will move from station to station, with the length of time at each station
predetermined and announced by the Event Supervisor. Participants may not return to stations but may
change or add information to their original responses while at other stations.
what is the overall activity for the event
The continuous process by which rocks change from one type to another over geological time.
what is Rock cycle
A mineral that breaks into smooth, flat surfaces shows which property
What is cleavage
A shiny mineral has a metallic luster but leaves a greenish-black streak. Why is streak more helpful than surface color?
Surface color can vary, but a streak shows the minerals' true color.
Metamophric, Sedimentry, Igneous.
WHat is Rock Topics
Processes that break down rock (weathering) and move it (erosion).
What is Weathering & Erosion
A mineral that breaks in uneven or jagged pieces instead of a flat plane, and which property is being observed?
What is a fracture
You find a mineral that is very heavy for its size and has no cleavage. Which two properties would best help you identify it, and why
What is density and fracture? Density distinguishes minerals with similar apperance, and fracture shows how it breaks.