Chemistry and Measurement – Flashcards
Unlock all answers in this set
Unlock answersquestion
| Chemistry |
answer
| The study if the composition and structure of materials and of the changes that the materials undergo. |
question
| Experiment |
answer
| An observation of natural phenomena carried out in a controlled manner so that the results can be duplicated and rational conclusions obtained. |
question
| Law |
answer
| A concise statement or mathematical equation about a fundamental relationship or regularity in nature. |
question
| Scientific Method |
answer
| A process of advancing scientific knowledge through observations; the framing of laws, hypotheses or theories; and the conducting of more experiments. |
question
| Method |
answer
| Experiments Results Hypothoses |
question
| A _____ explanation of a basic natural phenomenon. |
answer
| Tested |
question
| Law of Conservation of Mass |
answer
| The total mass remains constant during a chemical change. |
question
| Mass |
answer
| The quantity of matter in material. |
question
| Matter |
answer
| Whatever takes up space and can be perceived by our senses. |
question
| Classifying matter by its physical state. |
answer
| Solid, Liquid or Gas. |
question
| Classifying Matter by its chemical constitution. |
answer
| Element, compound, or mixture. |
question
| Solid |
answer
| characterized by rigidity; fixed volume and fixed shape. |
question
| Liquid |
answer
| relativity incompressible fluid; fixed volume, no fixed shape. |
question
| Gas |
answer
| Compressed fluid; no fixed volume, no fixed shape. |
question
| Physical Change |
answer
| A change in the form of matter but not its chemical identity. |
question
| Chemical Change |
answer
| a change in which one or more kinds of matter are transformed into a new kind of matter or several new kidns of matter. |
question
| Substance |
answer
| A kind of matter that cannot be separated into other kinds of matter by any physical process such as distillation or sublimation. |
question
| Element |
answer
| A substance that cannot be decompressed into simpler substances by any chemical reaction. |
question
| Compound |
answer
| A new substance composed of two or more elements chemically combined. |
question
| Law of Definite Proportions |
answer
| States that a pure compound whatever its source always contains definite or constant proportions of the elements by mass. |
question
| Mixture |
answer
| A material can be separated by physical means into two or more substances, has variable composition. |
question
| Heterogeneous Mixture |
answer
| A mixture that consists of physical distinct parts each with different properties. |
question
| Homogenous Mixture |
answer
| A mixture that is uniform in its properties also is called a solution. |
question
| Measurement |
answer
| The comparison of a physical quantity with a fixed standard of measurement - a unit. |
question
| Precision |
answer
| The closeness of the set of values obtained from repeated measurements of the same quality. |
question
| Accuracy |
answer
| The closeness of a single measurement to its true value. |
question
| Significant figures indicate _______. |
answer
| Precision |
question
| Exact Number |
answer
| A counted number or defined number. |
question
| Scientific Notation |
answer
| The representation of a number in the form. |
question
| SI units |
answer
| An international system of units made up of a petticoat choice of metric units. |
question
| Base Units |
answer
| The seven metric units from which all other units can be derived. |
question
| Temperature |
answer
| A measure of "hotness" |
