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34 Cards in this Set

  • Front
  • Back
What is a study of the composition, structure, and properties of matter and of changes that occur in matter?
What is anything that has mass and occupies space?
What are the smallest distinctive unit in a sample of matter?
What are larger units in which two or more atoms are joined together?
What refers to the types of atoms and the relative proportions of the different atoms in a sample of matter?
What is a characteristic displayed by a sample of matter without undergoing any change in its composition? (Ex. Odor)
Physical property
(Qualitative and Quantitative)
What is a characteristic displayed by a sample of matter as it undergoes a change in composition? (Ex. Flammability)
Chemical property
A sample of matter usually undergoes a noticeable change at the macroscopic level but no change in composition
Physical Change
A sample of matter undergoes a change in composition and/or a change in the structure of its molecules
Chemical Change
Chemical Reaction
What is a tpye of matter that has a definite, or fixe, composition that does not vary from one sampe of the substance to another?`
What is a substance that cannot be broken down into other simpler substances by chemical reactions?
What is a substance made up of atoms of two or more elements, with the different kinds of atoms combined in fixed proportions?
What is a one- or two-lettered designation dreived from the name of an element?
Chemical symbol
What has no fixed composition; its composition may vary over a broad range?
What is a mixture that has the same composition and properties throughout?
Homogeneous mixture
What varies in composition and/or properties from one part of the mixture to another, as in a glass of ice water?
Heterogeneous mixture
What is a tentative explanation or prediction concerning some phenomenon?
What is testing a hypothesis through a carefully controlled procedure?
What are the facts obtained through careful observation and measurements made during experiments?
Scientists try to identifiy patterns in large collections of data. They summarize these patters in brief statements called _________ ________.
Scientific Laws
What provides explanations of observed natural phenomena and predictions that can be tested by further experiments?
What is the SI base unit of length?
meter (m)
What is the same volume as 1 cubic decimeter or 1000 cubic centimeters?
liter (L)
What is the quantity of matter in an objects?
What is the force of Earth's gravity on the object?
What is the SI base quantity of mass?
kilogram (kg)
What is the SI base unit of temperature?
kelvin (K)
K= C + 273.15
C= 5/9(F - 32)
F= 9/5(C) + 32
Density = Mass/Volume

What refers to how clesly individual measurements agree with one another?
What is how close the average of the set comes to the true, or most probably, value?
All digits known with certainty plus the first uncertain one are called significant digits, or _________ _________. We use _________ _________ to reflect the precision of a measurement--the more significant figures, the more precise the measurement.
Significant figures
What is a ratio of terms--equivalent to the number 1--used to change the unit in which we express a quantity?
Conversion factor
What is the mass per unit volume of a substance?
Density (d)