Volcanic Ejecta
large pieces of solid volcanic ejecta that solidify before being ejected from the volcano
What are volcanic blocks?
Scale used to rate minerals from softest to hardest on a scale of 1-10
What is the Mohs Scale of Hardness?
a model of a design used for testing
What is a prototype?
the most common igneous rock, which covers much of the ocean floor
What is basalt?
The rarest, most durable, and most beautiful minerals
What are precious stones?
type of volcanic ejecta that is lava hardened to form either a smooth surface or ropy surface?
What is pahoehoe?
Large group of minerals that contain silicon and oxygen
What are silicates?
What is a proposition?
organic sedimentary rock that is a fossil fuel
What is coal?
A line of powder left by a mineral when it is rubbed across unglazed porcelain
What is a streak?
The general term for any piece of solid volcanic ejecta
What is pyroclast?
a green form of beryl
What is emerald?
A group in an experiment on which a test is performed
What is an experimental group?
rock that consists of smooth pebbles embedded in hardened sand or clay
What is conglomerate rock?
A mineral that remains glowing after being exposed to ultraviolet light and then placed in the dark
What is phosphorescent?
Type of mountain formed when molten rock erupted from a hole in the earth's crust?
What is a volcanic mountain?
a red variety of corundum
What is ruby?
Multiple scientists test the same scientific idea in different ways and all come to the same conclusion
What is reproducibility?
fine-grained sedimentary rock known for its ability to be split into thin layers
What is shale?
An artificial gemstone that looks like a natural gemstone but has different chemical and physical properties
What is a simulant gemstone?
Magma bulging overlying rocks upward to produce a dome-like intrusion
What is a laccolith?
Mineral group that contains flourine, chlorine, bromine, or iodine?
What are halides?
The logic error in which someone assumes a change in one factor caused a change in another factor only because the second change occurred after the first
What is a post hoc fallacy?
streaked metamorphic rock produced from limestone
What is marble?
What is oxides?