Exam (elaborations)
Pre-AP Chemistry Semester 1 Exam.
Pre-AP Chemistry Semester 1 Exam.
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Pre-AP Chemistry Semester 1 ExamScientific Method - correct answer-A logical systematic approach to the solution of a
scientific problem
Matter - correct answer-Anything that has mass and occupies space
Pure Chemistry - correct answer-The pursuit of chemical knowledge for its own sake
Alchemists - correct answer-Developed processes for separating mixtures and purifying
chemicals and also designed equipment that is still in use today
Chemistry - correct answer-The study of the composition of matter and the changes that
matter undergoes
Observation - correct answer-When you use your senses to obtain information you make
a(n)...
Hypothesis - correct answer-A proposed explanation for an observation is a(n)...
Experiment - correct answer-A procedure that is used to test a hypothesis is a(n)...
Theory - correct answer-A well-tested explanation for a broad set of observations is a(n)...
Independent Variable - correct answer-The variable that you change during an experiment is
the...
Dependent Variable - correct answer-The variable that is observed during the experiment is
the...
Mixture - correct answer-A physical blend of two or more components
Product - correct answer-A substance formed in a chemical reaction
Reactant - correct answer-Starting substance in a chemical reaction
Homogeneous - correct answer-Describes mixture with a uniform composition
Compound - correct answer-Composed of two or more substances chemically combined in a
fixed proportion
Mass - correct answer-Amount of matter an object contains
Chemical reaction - correct answer-Process in which substances are changed into different
substances
, Element - correct answer-Substance that cannot be changed into simpler substances by
chemical means
Color, odor, malleability, hardness, melting point, boiling point - correct answer-List the
physical properties of a substance (six things)
Oil - correct answer-To make a heterogeneous mixture, do you mix vinegar with water or oil?
Compound - correct answer-A substance that can be separated into two or more substances
only by a chemical change
Ability to rust - correct answer-Three of these are physical properties. Which is not? Mass,
color, melting point, ability to rust
Solution - correct answer-What's another term for a homogeneous mixture?
Salt water - correct answer-Which is a homogeneous mixture? Salt water, beef stew, sand
and water, soil
Gas production, precipitate formation, energy transfer - correct answer-What three things
indicate that a chemical change may have taken place?
Absolute zero - correct answer-The lowest point on the Kelvin scale
Kelvin temperature scale - correct answer-The SI scale for temperature
Weight - correct answer-The force of gravity on an object
1.54×10⁻¹⁰ m - correct answer-The diameter of a carbon atom is 0.000 000 000 154 m. What
is this number expressed in scientific notation?
Mass; volume - correct answer-Density is found by dividing _____ by ______
11 mm² - correct answer-What is the product of 2.2 mm and 5.00 mm using the correct
number of significant digits?
1.0×10³ L - correct answer-What is the measurement of 1042 L rounded off to two significant
digits?
Microliter - correct answer-Which of the following is smallest? Milliliter, microliter, liter,
deciliter
Liter - correct answer-What is NOT an SI unit but often mistaken as one? (measures
volume)
Two - correct answer-How many significant figures are in the measurement 0.0034 kg?
Five - correct answer-How many significant figures are in the measurement 811.40 grams?
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