18.1 The Origins of the Reformation

1-3: MeasurementWhat do scientists use to measure length, mass, volume, density, time, and temperature?

1Anticipatory SetWhat units of measure have you used in science investigations in the past?

California StandardsScience Standard 8.8.a: Students know density is mass per unit volume.Science Standard 8.8.b: Students know how to calculate the density of substances from measurements of mass and volume.

3InputSI: International System of Units (French, Systeme international dUnites).weight: measure of the force of gravity on you.mass: measure of the amount of matter an object contains.volume: the amount of space an object takes up.

4Inputmeniscus: curved, top surface of the water in a graduated cylinder.density: mass per unit volumeCelsius scale: water freezes at 0 degrees and boils at 100 degrees.Kelvin Scale: SI unit of temperature.absolute zero: 0 K (nothing can get colder)

5Modeling

Using SI as the standard system of measurement allows scientists to compare data and communicate with each other about their results. SI is based on the number 10.

6Modeling

SI unit of length is the meter.SI unit of mass is the kilogram.SI unit of volume is the cubic meter (m3).SI unit of density is the kilogram per cubic meter (kg/m3).SI unit of time is the second (s).SI unit of temperature is the kelvin (K).7Modeling

Volume = Length x Width x Height

8Modeling

Density = Mass Volume

An object that has a density less than 1.00 g/cm3 will float in water.9Two solid cubes have the same mass. They each have a mass of 50 g.

Cube A has a volume of 2cm x 2cm x 2cm. What is its density?

D = M VD = 50 g (2cm x 2cm x 2cm)D = 50 g 8 cm3D = 6.25 g/cm3

Modeling

10Two solid cubes have the same mass. They each have a mass of 50 g.

Cube B has a volume of 4cm x 4cm x 4cm. What is its density?

D = M VD = 50 g (4cm x 4cm x 4cm)D = 50 g 64 cm3D = 0.781 g/cm3

Modeling

11SI units are based on multiples of what number?10Will an object with a density of 0.7 g/cm3 float or sink in water?float, less than 1

Check forUnderstanding

12Answer #5, 8, 13Guided PracticeIndependent PracticeFinish the 1.3 Review & Reinforce worksheet.

13HOMEWORK EXTENSION

Write a detailed SUMMARY of the section and complete the UNANSWERED QUESTIONS section of your notes.

Choose two of the remaining Depth & Complexity ICONS in your notes and explain how they relate to this section.

Put It to the TestThey Might Be GiantsJohn Linnell/John FlansburghHere Comes Science2009iTunes 10.0.1, QuickTime 7.6.6