Topic: Scientific Measurement Date: Sept 15, 2014 Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision? Mrs. Norma D. Cullo DO NOW: Answer in your notes. 1.When do we use measurement? • Measurement is finding a value (number) that shows the size or amount of something. Accuracy is how close a measured value is to the actual (true) value. Precision is how close the measured values are to each other. 2. In the figures below, which do you think has a more accurate and precise measurement? Why? A B C High Precision High Accuracy High Accuracy High Precision
Topic: Scientific Measurement Date: Sept 15, 2014 Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision? Mrs.
Jan 18, 2018
Topic: Scientific Measurement Date: Sept 15, 2014 Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision? Mrs. Norma D. Cullo A Metric Ruler 1 (cm) centimeter = 10 (mm) Millimeters 1 Inch = 25.4 (mm)
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Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
DO NOW: Answer in your notes.
1. When do we use measurement? • Measurement is finding a value (number) that shows the
size or amount of something.
Accuracy is how close a measured value is to the actual (true) value. Precision is how close the measured values are to each other.
2. In the figures below, which do you think has a more accurate and precise measurement? Why?
A B C
High Precision High Accuracy High AccuracyHigh Precision
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
What do we Measure? What tools? Units used?
Length- metric ruler, meter
Mass- triple beam balance, grams
Volume- graduated cylinder, ml, cm3
Temperature- thermometer, Celsius, or centigrade (degrees)
Time- clock , seconds
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
A Metric Ruler1 (cm) centimeter = 10 (mm) Millimeters
1 Inch = 25.4 (mm)
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Prefixes1/100 1/1000
kilo
10001
1/10001/1000
(1) 1/100 meters
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
1cm= 10mm(micrometer, millimeter, centimeter, meter, kilometer)smallest
2.4 cm= 24mm 2.5cm= 25mm
biggest
1mm= 1000um (micrometer)- used in measuring the size of a cell.
Order of increasing size
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
1 cm = 10 mm
9.0 cm= 90mm
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
•Volume reading is taken at the bottom or lower miniscus (curved surface)
HOW DO YOU READ THE VOLUME OF A LIQUID?
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
Measuring Mass or Weight
300+70+3.5=373.5 g
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
Measuring Temperature
-2 C
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
Class work:
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Mrs. Norma D. Cullo
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
2. A student, using a metric ruler, measured a larva as represented in the accompanying diagram.
What is the length of the larva, (a) in centimeters? _____________________
(b) in millimeters? _____________________
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
Leaf A = 5.5 cm Note; 1 cm= 10mm
Leaf B= 3.3 cmdifference 2.2 cm = 22 mm is closer to 20 mm
Topic: Scientific Measurement Date: Sept 15, 2014Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision?
EXIT QUESTIONS:HOW DO YOU READ THE VOLUME OF A LIQUID?________________________________________________
____________________________________________________________________________________________________________________________________
WHY IS ACCURACY AND PRECISION IMPORTANT IN MEASUREMENT?
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
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