measurement. biology ‘bio-’ means life ex: biography -’ology’ means the study of ex:...
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Measurement
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Biology
‘BIO-’ means lifeEx: biography
-’OLOGY’ means the study of Ex: radiology
What do you think BIOLOGY means?
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Metric System
The metric system is also known as the International System of Units (SI)
We will be using the metric system in Science for any measurement
United States is 1 of the 3 countries that does NOT use the Metric System We use inches, pounds, Fahrenheit, etc….
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Four Main types of Measurement
1. Volume2. Temperature3. Mass4. Length
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1. Volume Definition: Used to measure space in an object
Volume of a Solid Object (LxWxH) Volume of Liquid
Base Unit: Liter (L) kL, L, mL
Measurement Tool: Graduated Cylinder or Beaker
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Graduated Cylinder
When you read the volume of a liquid in a graduated cylinder, you must read the MENISCUS Meniscus: curved surface of a liquid in a
tube
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2.Temperature
Definition: How hot or cold something is
Unit: Celsius (NOT FAHRENHEIT!!!) -Equipment: Thermometer
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3. Mass
Definition: How much mass (stuff) is in an object
Unit: Gram (kg, g)Equipment: Scale
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Mass vs. Weight
Mass: the actual measure of the AMOUNT of matterWeight: the measure of the amount of matter effected by gravity
Weight = mass x gravity W=mg
Question: Why is it important to think of matter in terms of mass (and not weight)?
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4. Length
Definition: Distance between two points
Base Unit: Meter (km, m, cm, mm)
Equipment: RulerAlways start at 0 cm
WE DO NOT USE INCHES IN SCIENCE!!!
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Kilo-liter>Liter (base word)> Centi-liter > Milli-liter
Which is bigger? 50 liters or 50 milliliters?
Abbreviations:Kilo: K Kilogram: KgCenti: C Centigram: cgMilli: M Milligram: mg