For the Majority of Minerals,the Streak Color Obtained When the Mineral

question 1

Multiple Choice

For the majority of minerals,the streak color obtained when the mineral is scratched against a porcelain plate is ____________.

• A) likely to be diagnostic only if the mineral is hard enough to scratch porcelain
• B) more variable than the color in hand sample among crystals
• C) less variable than the color in hand sample among crystals
• D) always dark brown or black

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Definitions:

Representative Sample

A segment of a population that faithfully reflects the traits of the whole community.

Random Selection

A method of choosing individuals or items from a larger population using a process that gives each possible choice an equal chance of being selected.

Lab Rats

Commonly used term for rats that are bred and kept for scientific research.

Scientific Method

A systematic and logical approach to discovering how things in the universe work, based on observation, hypothesis, experimentation, and conclusion.