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# PS:

### Ch 2

Term or Question | Answer or definition |
---|---|

Often called the "Language of Science" | Mathematics |

Science of Quantity | Mathematics |

Science put to use through Mathematics | Technology |

Mathematical sentences | Equations |

Use symbols to summarize a mathematical relationship between quantities | Equations |

The most important part of an equation | = (equals sign) |

Where all lines drawn outward from the center intersect from the same spiral at the same angle is known as __?__ | Logarithmic Spriral |

How closely a measurement reflects the actual value | Accuracy |

The repeatability of a measurement | Precision |

A "short cut" to writing very large or small numbers by using the powers of 10 is called | Scientific Notation |

A large number will have a __?__ exponent | positve |

A small number will have a __?__ exponent | negative |

In order for measured data to be meaningful, it must include what 3 things | Units, Unit must match quantity being measured, and others need to know what the unit's mean |

Which ancient measurement deals with the distance from the elbow to the tip of the middle finger | Cubit |

Which ancient measurement deals with the distance of a palm's breadth | Palm |

Which ancient measurement deals with the width of an outstretched hand | Span |

Which ancient measurement deals with a finger's breadth | Digit |

Which ancient measurement deals with the length of a person's foot | Foot |

What is the major concern or problem with the ancient measurements | Every person is shaped and sized differently |

A uniform unit of measure | standard of measure |

The U. S. customary system is? | F.P.S. system |

F.P.S. stands for | Foot-Pound-Second |

Most all other nations besides the U. S. use this system that is based on powers of 10 | Metric |

k | kilo |

M | mega |

G | giga |

h | hecto |

da | deca |

d | deci |

c | centi |

m | milli |

µ | micro |

n | nano |

one thousand | kilo |

one million | mega |

one billion | giga |

one hundred | hecto |

ten | deca |

one tenth | deci |

one hundredth | centi |

one thousandth | milli |

one millionth | micro |

one billionth | nano |

SI stands for | Systeme International d'Unites (International System of Units |

SI unit for measuring length | meter (m) |

SI unit for measuring capacity | liter (L) |

SI unit for measuring mass and weight | kilogram (kg) |

SI unit for measuring time | second (s) |

SI unit for measuring temperature in other nations and in the U. S. for scientific, technical, and military purposes | Celsius |

SI unit for measuring temperature in the U. S. weather | Fahrenheit |

Temperature that contains an absolute zero | Kelvin |

Amount of space that matter takes up | Volume |

to find volume in similar geometric shapes, we use a common formulas which is __?__ | v=lwh |

Volume of an irregularly shaped solid can be measured through what technique | Fluid displacement |

The formula for Fluid displacement | V=Vf – Vi |

A less accurate and less used method to detect volume is with a container that has volume markings. What is this method known as __?__ | Direct Volume measurement |

how tightly packed mass is in a certain volume is called __?__ | Density |

Density = | mass (g))/(volume (cm3) |

We can use density to identify __?__ | substances |

The ratio of the density of a substance to the density of a standard | Specific Gravity |

__?__ is just a number with no units | Specific Gravity |

a solid will only __?__ in a liquid if and only if the solid has a lower __?__ than the liquid | float; density |

Review the following kinds of problems | Scientific Notation; Sig Digs; Dimensional Analysis, Converting temperatures, Calculating volume and density |

Created by:
Mrs. Sechrist