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Pre AP Chemistry Fall Exam Review.
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Pre AP Chemistry Fall Exam Review.
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Pre AP Chemistry Fall Exam ReviewIndependent Variable - correct answer-Variable that does not change
Dependent Variable - correct answer-Variable that is being measured
Control Variable - correct answer-The variables that remain constant
Control Group - correct answer-The group that isn't being tested
Name a piece of equipment that is used to measure the mass of an object? - correct
answer-Balance
Name some pieces of equipment used to measure the volume of a liquid? - correct
answer-Graduated cylinder
Volumetric flask
Buret
What is the proper order to mix water and an acid? - correct answer-Acid into water
What should you do first in a emergency lab situation? - correct answer-Tell the teacher
Physical properties? - correct answer-A property is a characteristic that distinguishes the
substance
Chemical properties? - correct answer-Change the Substance and cannot be changed back
Intensive physical property? - correct answer-Properties that describe the substance itself
Ex: conductivity, melting point, density, luster, malleability
Extensive physical property? - correct answer-Depend on the amount of matter present
Ex: volume, mass and length
Physical Change? - correct answer-Does not change the identity of the substance
Chemical change? - correct answer-Transform one or more substances into a new,different
substance
What are some evidence that a chemical change has taken place? - correct
answer--Unexpected change in temperature
- gas is produced (bubbles)
- new odor is formed
- unexpected color change
- light produced
- mass change
- precipation formed(cloudiness)
, What is precipitate? - correct answer-A insoluble solid formed formed from a of two
substances or liquids
Alcohol evaporating
Physical or Chemical Change? - correct answer-Physical
Ice Melting
Physical or Chemical Change? - correct answer-Physical
Leaf changing color
Physical or Chemical? - correct answer-Chemical
Bending a wire
Physical or Chemical? - correct answer-Physical
Salt deposit forms due to evaporation
Physical or Chemical? - correct answer-Physical
Milk turns sour
Physical or Chemical? - correct answer-Chemical
Sublimation of dry ice
Physical or Chemical? - correct answer-Physical
Dew forming on the grass
Physical or Chemical? - correct answer-Physical
Ice cubes forming in the freezer? - correct answer-Physical
Silver Tarnishing
Physical or Chemical? - correct answer-Chemical
Metal Rusting
Physical or Chemical? - correct answer-Chemical
Paper Burns
Physical or Chemical? - correct answer-Chemical
Precipitate Formation
Physical or Chemical? - correct answer-Chemical
Water boils
Physical or Chemical? - correct answer-Physical
Which of the following are pure substances?
A. Element
B. Homogenous Mixture
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