Aim #10: How do scientists make detailed observations? Date: September 27, 2016 Aim #10: How do scientists make detailed observations? HW: 1) Worksheet- making measurements due Thursday 2) Quiz Corrections due tomorrow 3) Quiz #2 Wednesday Do Now: Complete the following conversions: 1) 8.24 km =_______________ dm 2) 5.44 m =_______________ cm 3) 9.133 g =_______________ kg 4) 7.050 L =_______________ mL

1. How can we make more detailed observations? Use instruments to measure things… Quantitative observations

2. SI= International System of Units (The Metric System) Measure Definition Unit(s) Symbol(s) Instrument(s) Distance Length, width, height Meter m Mass The amount of stuff Gram g Liquid Volume The amount of space it takes Liter L Temperature How hot or cold something is Degrees Celsius C Time How long it takes Seconds S Ruler Balance Graduated Cylinder Thermometer Stopwatch

Metric Ruler

3. How can we read metric measurement? B C cm What is the distance between A and B? 1.5 15 Point A= _____ cm or _____ mm Point B= _____ cm or _____ mm Point C= _____ cm or _____ mm 72 7.2 72mm-15mm = 57 mm 10.3 103

4. How do we measure volume of a liquid? How many mL of liquid are in this graduated cylinder? 11 ml Always measure volume from the bottom of the meniscus!

5. How do we measure temperature? Celsius Thermometer Important temperatures to know: 0˚C- Water freezes 20 ˚C- Room Temperature 37 ˚C- Normal Body Temperature 100 ˚C- Water Boils

6. How do we measure with a triple beam balance? Place all markers to zero.(The pointer should be lined up with zero.) Place object on the plate and move markers until the pointer lines up with zero again. Read markings on slider scale (add values together).

Practice Packet pages 19-21