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# Honos Chem. 9 Test

### Dr. Kloor

Question | Answer |
---|---|

Is used to write very large number or very small numbers | Scientific Notation |

Is a measure of the reproducibility of measurement | Precision |

Is a technique for converting between units | Dimensional Analysis |

Is used to make units smaller or larger | Metric Prefixes |

Anything that has mass or volume | Matter |

Is the capacity to do work | Energy |

Theoretically lowest temperature that can be reached | Absolute Zero |

Substances that cannot be changed into simpler substances by a chemical change | Element |

Substances that contain two or more elements in a fixed proportion | Compound |

A blend of two or more pure substances | Mixture |

A method to separate heterogenous mixtures | Filtration |

A method to separate homogenous mixtures | Distillation |

T/F: Temperature is a measure of how hot or cold something is | True |

T/F: The four states of matter are solid, liquid gas and air. | False |

T/F: For numbers less than one the exponent is positive | False |

T/F: One calorie is the amount of heat that raises the temperature of one gram of water by one degree centigrade | True |

T/F: Liquids as matter have definite volume and definite shape | False |

T/F: The SI temperature scale is called the Kelvin scale | True |

In the measurement 43.52 centimeters which digit is the most uncertain? | 2 |

The number of significant figures in the measurement 6.80 is? | 3 |

The number 210,000 has how many significant figures? | 2 |

A lump of coal | Potential Energy |

Crushing a can | Physical change |

Lighting a match | Chemical Change |

A waterfall | Kinetic Energy |

If D=m/v what is the density of an unkown element that has a mass of 10 g. and a volume of 50cm3 | 0.2g/cm3 |

If 1 calorie = 4.184 joules then 10 calories = how many joules | 41.84 |

Write the correct scientific notation for the number 503,000,000 | 5.03×10- 8 |

A baby has a fever his temperature is 40 degrees centigrade/celsius. What is his temperature in the Kelvin Scale | 313K |

After making an observations and proposing an hypothesis, a scientist's next step is: | Perform an experiment |

The metric measure best suited to measure distance between jackson, MS. And Memphis Tn. Would be | Kilometer |

How many significant digits are in the measurement 5.0070 g? | Five |

T/F: It is not necessary to clean up your work area in a lab | False |

T/F: All lab measurements are certain | False |

T/F: The density of a substance is measured in g/cm3 | True |

T/F: The metric system uses measures of ten to express large or small numbers and is used by the scientific community | True |

1 Kilometer | 1,000 meters |

1 centimeter | 1,000,000 millimeters |

1 mega gram | 0.000,001 |