Chapter 7 - Section 2 Flashcards
element
A substance that cannot be broken down into other substances.
compound
A substance in which two or more elements are chemically joined.
physical property
Any characteristic of a substance that can be observed or measured without changing the composition of the substance.
chemical property
Any property of a substance that produces a change in the composition of matter.
viscosity
The resistance of a liquid to flowing.
silica
A material found in magma that is formed from the elements oxygen and silicon.
pahoehoe
A hot, fast-moving type of lava that hardens to form smooth, ropelike coils.
aa
A slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe.
Which has a higher viscosity, a fast-flowing liquid or a slow-flowing liquid?
slow-flowing liquid
What two main factors affect magma’s viscosity?
the magma’s silica content and temperature