Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/34

Click to flip

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?
Chemistry
What is anything that has mass and occupies space?
Matter
What are the smallest distinctive unit in a sample of matter?
Atoms
What are larger units in which two or more atoms are joined together?
Molecules
What refers to the types of atoms and the relative proportions of the different atoms in a sample of matter?
Composition
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?`
Substance
What is a substance that cannot be broken down into other simpler substances by chemical reactions?
Element
What is a substance made up of atoms of two or more elements, with the different kinds of atoms combined in fixed proportions?
Compound
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?
Mixture
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?
Hypothesis
What is testing a hypothesis through a carefully controlled procedure?
Experiment
What are the facts obtained through careful observation and measurements made during experiments?
Data
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?
Theory
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?
Mass
What is the force of Earth's gravity on the object?
Weight
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

g/mL
What refers to how clesly individual measurements agree with one another?
Precision
What is how close the average of the set comes to the true, or most probably, value?
Accuracy
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)