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Chapter 1
Pure Substances
Mixtures
Properties
Changes
100
_________________ is a system of knowledge and the methods to find the knowledge.
What is science?
100
___________ are matter that always has exactly the same composition.
What are pure substances?
100
In ___________ parts of the mixture are noticeable different from one another.
What is heterogeneous mixture?
100
What is resistance to flow?
What is viscosity?
100
______________ occurs when there is a change in a substance, but the material remains the same.
What is physical change?
200
______________ describes a pattern in nature without attempting to explain it.
What is scientific law?
200
Name two examples of pure substances.
What are salt and sugar?
200
In ____________ substances are evenly distributed so it's difficult to tell one substance from another.
What is homogeneous mixture?
200
________________ is any property that produces a change in the composition of matter.
What is chemical property?
200
Name an example of a physical change.
What is cutting hair, crumpling paper, etc.?
300
___________ refers to how exact a measurement is.
What is precision?
300
_____________ is a substance that can't be broken down into simpler substance.
What is element?
300
_____________ is a heterogeneous mixture that separates into layers over time.
What is suspension?
300
Name three physical properties.
What is viscosity, melting point, boiling point, density, mass, etc.?
300
What are three indicators of a chemical change?
What are change of color, production of a gas, and formation of a precipitate?
400
What are the three types of natural science?
What are Life, Physical, and Earth and Science?
400
________________ is a substance that is made from 2 or more elements.
What is a compound?
400
______________ is used to separate a mixture based on particle size.
What is filtration?
400
Name two chemical properties.
What are flammability and reactivity?
400
What happens to the substance during a physical change?
What is the substance doesn't change?
500
Convert 87,000,000 to scientific notation.
What is 8.7x107?
500
Classify NaOH as an element, compound, or mixture.
What is a compound?
500
Give an example of a homogeneous mixture.
What is Kool-Aid, salt water?
500
Determine the density of an unknown material that has a volume of 25mL and a mass of 76 g.
What is 3.04 g/mL?
500
_____________ is a solid that forms and separates from a liquid mixture.
What is a precipitate?