2. Dissolved salt increases Hypothesis? IF the water temperatures increases, THEN dissolved salt increases Independent variable Dependent variable Water temperature increase
4. What tools to scientists use? balance ruler To measure … MASS LENGTH
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6. Measuring Length How many millimeters are in 1 centimeter? What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm What is the length of the line in centimeters? ________cm 1 centimeter = 10 millimeters
7. Measuring Mass We will be using triple-beam balances What would be the mass of the object measured in the picture? _______ + ______ + _______ = ________ g
9. How do we measure the mass of liquid? 5 grams? 10 grams? 10,000 grams?
10. How do we measure the mass of liquid? Mass of beaker Mass of beaker with liquid - = Mass of liquid 10 grams 3 grams
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12. Measuring Solid Volume We can measure the volume of regular object using the formula length x width x height . _____ X _____ X _____ = _____ 10 cm 9 cm 8 cm http://resources.edb.gov.hk/~s1sci/R_S1Science/sp/en/syllabus/unit14/new/testingmain1.htm We can measure the volume of irregular object using water displacement . Amount of H 2 O with object = ______ About of H 2 O without object = ______ Difference = Volume = ______
13. KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit CENTI 0.01 Unit MILLI 0.001 Unit Ladder Method 4 km = _________ m How many jumps does it take? 4. = 4000 m Meters Liters Grams How do you use the “ladder” method? 1 st – Determine your starting point. 2 nd – Count the “jumps” to your ending point. 3 rd – Move the decimal the same number of jumps in the same direction. 1 2 3 Starting Point Ending Point 1 __ . 2 __ . 3 __ .