1. 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? AB C High PrecisionHigh Accuracy High Accuracy High Precision

2. 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 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

3. 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)

4. Topic: Scientific Measurement Date: Sept 15, 2014 Aim: How do I measure mass, length, volume of liquids, and temperature with accuracy and precision? Prefixes 1/100 1/1000 kilo 1000 1 1/1000 (1) 1/100 meters

5. 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 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

6. 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 1 cm = 10 mm 9.0 cm= 90mm

7. 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 Volume reading is taken at the bottom or lower miniscus (curved surface) HOW DO YOU READ THE VOLUME OF A LIQUID?

8. 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 Measuring Mass or Weight 300+70+3.5=373.5 g

9. 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 Measuring Temperature -2 C

10. 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 Class work:

11. 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

12. 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

13. Topic: Scientific Measurement Date: Sept 15, 2014 Aim: 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? _____________________

14. Topic: Scientific Measurement Date: Sept 15, 2014 Aim: 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 cm difference 2.2 cm = 22 mm is closer to 20 mm

15. Topic: Scientific Measurement Date: Sept 15, 2014 Aim: 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? ________________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ _______