Chem chapter e

Qualitative observations

• Descriptive in nature

• Changes in color and physical state

• Measurements

• Varying precision and accuracy

Quantitative observations

• measurements

• Varying precision and accuracy

• Numerical values obtained from instrumentation,

  glassware, and other measuring devices

• counted values

• States of matter

used in the United States

• English system

• Metric system

Use in most if the word

• metric

• English

Scientists use______ which is based on the metric system

Standard unit for length

Standard unit for Mass

Standard unit for Time

Standard unit for Temperature

Standard unit for Amount of a substance