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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