What is a pure substance?
Matter Pre-Assessment

Flashcard
•
Science
•
10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
A material that has a constant composition and consistent properties throughout. Examples include elements and compounds.
2.
FLASHCARD QUESTION
Front
What is a heterogeneous mixture?
Back
A mixture where the different components can be seen and easily separated. Example: salad.
3.
FLASHCARD QUESTION
Front
What is a homogeneous mixture?
Back
A mixture that has a uniform composition throughout. Example: saltwater.
4.
FLASHCARD QUESTION
Front
What is an element?
Back
A pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen and oxygen.
5.
FLASHCARD QUESTION
Front
What is a compound?
Back
A substance formed when two or more elements chemically bond together. Example: water (H2O).
6.
FLASHCARD QUESTION
Front
What is the difference between a mixture and a pure substance?
Back
A mixture contains two or more substances that are not chemically combined, while a pure substance has a uniform and definite composition.
7.
FLASHCARD QUESTION
Front
What is an example of a pure substance (element)?
Back
Gold (Au) is an example of a pure substance that is an element.
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