Measurement in Science The Metric System Scientists worldwide report results this way Scientists worldwide report results this way AKA: International.

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Presentation transcript:

Measurement in Science

The Metric System Scientists worldwide report results this way Scientists worldwide report results this way AKA: International System of Units, or SI. AKA: International System of Units, or SI. Prefixes: Prefixes: Mega 1,000,000 x Deci 1/10 Centi 1/100 Milli 1/1000 Kilo 1000x Deca 10x

Length 1 METER = 39.4 inches 1 METER = 39.4 inches Units smaller or larger than 1 meter are given prefixes: Units smaller or larger than 1 meter are given prefixes: 1/100 of a meter = 1 centimeter 1/100 of a meter = 1 centimeter 1/1000 of a meter = 1 millimeter 1/1000 of a meter = 1 millimeter 1000 meters = 1 kilometer 1000 meters = 1 kilometer

Significance in Measurement Which of the following best describes the length of the beetle's body in the picture to the left? Which of the following best describes the length of the beetle's body in the picture to the left? a) Between 0 and 2 in b) Between 1 and 2 in c) Between 1.5 and 1.6 in d) Between 1.54 and 1.56 in e) Between and in

Significance in Measurement The correct answer The correct answer is... is... (d), between 1.54 and 1.56 inches

Mass GRAM GRAM For larger objects, we use kg. For larger objects, we use kg. 1 kg = 2.2 pounds. Your mass in kg? 1 kg = 2.2 pounds. Your mass in kg? How many milligrams in a kilogram? How many milligrams in a kilogram?

Volume: amount of space an object occupies. LITER (L) for liquids Cubic centimeter (cm3) for solids # Milliliters (mL) in 1L?

How to measure 43.0 mL 5.45 mL 30.0 degrees C

Volume: amount of space an object occupies. Displacement Method

Temperature degrees Celcius ( o C) degrees Celcius ( o C) Important to know: Important to know: 100 o C = water boils 100 o C = water boils 0 o C = water freezes 0 o C = water freezes 37 o C = human body temp 37 o C = human body temp

What unit would you use to measure… The volume in a pop bottle? The volume in a pop bottle? The volume of a small sample of hydrochloric acid for lab? The volume of a small sample of hydrochloric acid for lab? The volume of a swimming pool? The volume of a swimming pool? The temperature of the Gulf of Mexico? The temperature of the Gulf of Mexico?

What unit would you use to measure… The mass of Mr. Orend? The mass of Mr. Orend? The mass of a small planet? The mass of a small planet? The mass of a chemical powder for lab? The mass of a chemical powder for lab? The length of I-79? The length of I-79? The length of a whale? The length of a whale? The length of a pencil? The length of a pencil?

Compare the 2 systems of measurement EnglishMetric Mass/ Weight Temperature Volume Length Speed Time

Mealworms Lab Be sure to make accurate measurements You will measure the length, mass, and volume of the mealworms. Be respectful to the mealworms and your partner!!!! Safety: Do not touch your face with worm hands! Take turns on different parts of the lab so too many students aren’t at the same station. SHOW YOUR WORK when making conversions.