Methods of Science Lesson 2: Measurements and Scientific Tools - Weebly

Methods of Science Lesson 2: Measurements and Scientific Tools

Description: a spoken or written summary of observations

2 types of descriptions o Qualitative descriptions: use your senses to describe observations Color of a shirt o Quantitative description: use numbers and measurements to describe an observation 70oC outside

Explanation: an interpretation of an observation

International System of Units (SI): the internationally accepted system for measurement

Quantity Measured

Unit

Symbol

Length

Meter

m

Mass

Kilogram

kg

Time

Second

s

Electric Current

Ampere

A

Temperature

Kelvin

K

Amount of Substance

Mole

mol

Intensity of light

Candela

cd

Measurement and Uncertainty: Measure how precise your instrument can measure Estimate the last number

Significant Digits and Rounding ? you will discuss in grade 9 We will use a "reasonable" set of numbers

Mean, Median, Mode, and Range Mean: average Median: middle number Mode: number that appears most Range: greatest ? smallest numbers

Scientific Tools: Science Journals Rulers and Metersticks Glassware

 Triple-Beam Balance Thermometer Computers and the Internet Tools used by Earth Scientists

o Binoculars o Compass o Wind Vane and Anemometer o Streak Plate

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