 Measurement. Biology  ‘BIO-’ means life  Ex: biography  -’OLOGY’ means the study of  Ex: radiology  What do you think BIOLOGY means?

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Presentation transcript:

 Measurement

Biology  ‘BIO-’ means life  Ex: biography  -’OLOGY’ means the study of  Ex: radiology  What do you think BIOLOGY means?

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….

Four Main types of Measurement  1. Volume  2. Temperature  3. Mass  4. Length

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

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

2.Temperature  Definition: How hot or cold something is  Unit: Celsius (NOT FAHRENHEIT!!!) -  Equipment: Thermometer

3. Mass  Definition: How much mass (stuff) is in an object  Unit: Gram (kg, g)  Equipment: Scale

Mass vs. Weight Mass: the actual measure of the AMOUNT of matter Weight: 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)?

4. Length  Definition: Distance between two points  Base Unit: Meter (km, m, cm, mm)  Equipment: Ruler  Always start at 0 cm WE DO NOT USE INCHES IN SCIENCE!!!

Kilo-liter>Liter (base word)> Centi- liter > Milli-liter Which is bigger? 50 liters or 50 milliliters? Abbreviations: Kilo: K  Kilogram: Kg Centi: C  Centigram: cg Milli: M  Milligram: mg