CHEM 101-Straighterline Exam 1 Questions And
Correct Solutions (Verified Answers)
A substance in which the atoms or molecules are free to move relative to one another. It
always assumes the shape and volume of its container. CORRECT ANSWERS gas
A substance in which the atoms or molecules pack closer than a gas, but are still able to
freely move relative to one another. It exhibits a fixed volume, but not a fixed shape.
CORRECT ANSWERS liquid
A substance in which the atoms or molecules are fixed at a specific position. It exhibits
a fixed volume and rigid shape. CORRECT ANSWERS solid
A solid that has atoms and molecules in a repeatable pattern. CORRECT ANSWERS
crystalline solid
A solid whose atoms or molecules are not arranged in a specific pattern. CORRECT
ANSWERS amorphous solid
A substance does not vary its composition within the substance nor between samples of
the same substance. CORRECT ANSWERS pure substance
A physical combination of substances in which each substance keeps its own physical
and chemical properties. CORRECT ANSWERS mixture
A physical combination of substances of non-uniform composition. CORRECT
ANSWERS heterogeneous mixture
A physical combination of substances of uniform composition. CORRECT ANSWERS
homogeneous mixture
A pure substance that cannot be broken into component parts. Examples include
helium, nitrogen, and oxygen. CORRECT ANSWERS element
A pure substance made up of two or more elements. CORRECT ANSWERS compound
A quantitative observation. CORRECT ANSWERS measurement
Any division of a quantity that may be used in a measurement. CORRECT ANSWERS
unit
The SI unit for length. CORRECT ANSWERS meter
The SI unit for time. CORRECT ANSWERS second
, The SI unit for mass. CORRECT ANSWERS kilogram
The standard unit of measurement used to count atoms. CORRECT ANSWERS mole
A unit system abbreviated as SI that is used by scientists. CORRECT ANSWERS
International System of Units
A unit system of measurement used throughout the world. CORRECT ANSWERS
metric system
A unit system of measurement mainly used in the United States. CORRECT ANSWERS
english system
Changes the SI unit by a power of 10. CORRECT ANSWERS prefix multiplier
An English temperature unit system used mainly in the United States. CORRECT
ANSWERS fahrenheit
A combination of SI units. CORRECT ANSWERS derived units
A metric temperature unit system used throughout the world. CORRECT ANSWERS
celsius
A derived unit defined as mass/volume. CORRECT ANSWERS density
A property that does not depend on the amount of a substance. CORRECT ANSWERS
intensive property
A property that depends on the amount of a substance. CORRECT ANSWERS
extensive property
A measurement that is repeatable in an experimental setup, within an acceptable range
of error. CORRECT ANSWERS reliable measurements
How close a series of measurements are to each other. CORRECT ANSWERS
precision
How close a series of measurements are to the actual value. CORRECT ANSWERS
accuracy
A non-place-holding digit in any numerical measurement. CORRECT ANSWERS
significant digit
Rounding numerical data to the nearest power of 10 for rapid estimated calculations.
CORRECT ANSWERS order-of-magnitude estimation
Correct Solutions (Verified Answers)
A substance in which the atoms or molecules are free to move relative to one another. It
always assumes the shape and volume of its container. CORRECT ANSWERS gas
A substance in which the atoms or molecules pack closer than a gas, but are still able to
freely move relative to one another. It exhibits a fixed volume, but not a fixed shape.
CORRECT ANSWERS liquid
A substance in which the atoms or molecules are fixed at a specific position. It exhibits
a fixed volume and rigid shape. CORRECT ANSWERS solid
A solid that has atoms and molecules in a repeatable pattern. CORRECT ANSWERS
crystalline solid
A solid whose atoms or molecules are not arranged in a specific pattern. CORRECT
ANSWERS amorphous solid
A substance does not vary its composition within the substance nor between samples of
the same substance. CORRECT ANSWERS pure substance
A physical combination of substances in which each substance keeps its own physical
and chemical properties. CORRECT ANSWERS mixture
A physical combination of substances of non-uniform composition. CORRECT
ANSWERS heterogeneous mixture
A physical combination of substances of uniform composition. CORRECT ANSWERS
homogeneous mixture
A pure substance that cannot be broken into component parts. Examples include
helium, nitrogen, and oxygen. CORRECT ANSWERS element
A pure substance made up of two or more elements. CORRECT ANSWERS compound
A quantitative observation. CORRECT ANSWERS measurement
Any division of a quantity that may be used in a measurement. CORRECT ANSWERS
unit
The SI unit for length. CORRECT ANSWERS meter
The SI unit for time. CORRECT ANSWERS second
, The SI unit for mass. CORRECT ANSWERS kilogram
The standard unit of measurement used to count atoms. CORRECT ANSWERS mole
A unit system abbreviated as SI that is used by scientists. CORRECT ANSWERS
International System of Units
A unit system of measurement used throughout the world. CORRECT ANSWERS
metric system
A unit system of measurement mainly used in the United States. CORRECT ANSWERS
english system
Changes the SI unit by a power of 10. CORRECT ANSWERS prefix multiplier
An English temperature unit system used mainly in the United States. CORRECT
ANSWERS fahrenheit
A combination of SI units. CORRECT ANSWERS derived units
A metric temperature unit system used throughout the world. CORRECT ANSWERS
celsius
A derived unit defined as mass/volume. CORRECT ANSWERS density
A property that does not depend on the amount of a substance. CORRECT ANSWERS
intensive property
A property that depends on the amount of a substance. CORRECT ANSWERS
extensive property
A measurement that is repeatable in an experimental setup, within an acceptable range
of error. CORRECT ANSWERS reliable measurements
How close a series of measurements are to each other. CORRECT ANSWERS
precision
How close a series of measurements are to the actual value. CORRECT ANSWERS
accuracy
A non-place-holding digit in any numerical measurement. CORRECT ANSWERS
significant digit
Rounding numerical data to the nearest power of 10 for rapid estimated calculations.
CORRECT ANSWERS order-of-magnitude estimation
