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Metric System

Explore the metric system, SI units, measuring length, volume, mass, density, and temperature through instruments like rulers and graduated cylinders. Practice measuring various items at home using centimeters.

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Metric System

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  1. Metric System Measurement and SI

  2. Bell Work 8/16/10 Please answer the following questions in the Bell Work section of your science journal • What instrument is used to measure length? • Why do you think it is important to know how to measure length?

  3. Metric System • Referred to as the international system of units or SI • Based on the number 10 • Measuring system used by all scientists • Used to measure length, volume, mass, weight, density, and temperature

  4. Length • Used to measure from one point to another • Instrument used to measure length is the metric ruler • Basic unit of length is the meter • kilometer- km • hectometer- hm • decameter- dam • meter-m • decimeter- dm • centimeter- cm • millimeter – mm • In space, distance is measured in light years • A light year is the distance light travels in a year

  5. Bell Work 8/17/10 • What is the metric system used to measure? • What is the metric system referred to as? • What is the basic unit for length? • In space, what is distance measured in?

  6. Homework 8/17/10 Practice measuring the following items at your house. Remember to use centimeters as your unit. • The width of your front door • The height of a glass or cup • One item of your choice • For each write down the item and the measurement for the item

  7. Bell Work 8/18/10 Using a ruler and centimeters (cm) measure the length of the lines on the piece of paper at your table. Please share with your partner and don’t write on the paper. Example: 6.3 cm • Length of line 1: • Length of line 2: • Length of line 3: • Length of line 4:

  8. Volume • Volume is the amount of space an object takes up • Volume can be measured for liquids and solids. • Liquids Basic unit of liquid volume is the liter (L) • kiloliter – kL • hectoliter – hL • dekaliter – daL • liter – L • deciliter – dL • centiliter – cL • millimeter – mL • The instrument used to measure liquid volume is the graduated cylinder • Meniscus – Measure to this line.

  9. Volume (cont.) • Solids Basic unit of solid volume is cubic meters (m^3) • cubic kilometer- km^3 • cubic hectometer- hm^3 • cubic decameter- dam^3 • cubic meter-m^3 • cubic decimeter- dm^3 • cubic centimeter- cm^3 • cubic millimeter – mm^3

  10. Volume (cont.) • To calculate the volume of a solid • length x width x height • l x w x h • Instrument used to measure solid volume is the metric ruler • Solid Volume can also be measured by water displacement using a graduated cylinder • Record the volume of water in the cylinder • Place the object in the cylinder and record the new volume • Measurement 2 – measurement 1 = volume of the object

  11. Bell Work 8/19/10 • What is volume? • What is the basic unit for liquid volume? • What is the basic unit for solid volume? • How do you calculate the volume of a solid?

  12. Bell Work 8/20/09 1. What is the volume of a solid with these measurements? Length 3 cm width 2 cm height 4 cm 2. How do you find the volume of an irregular solid?

  13. Mass • Mass is the amount of matter in an object. • Basic unit of mass is a gram (g) • Large objects are measured in kilograms (kg) • Small objects are measured in grams (g) or milligrams (mg) • kilogram – kg • hectogram – hg • dekagram – dag • gram – g • decigram – dg • centigram – cg • milligram – mg • Most often used are the kg, g, and the mg • Instrument used to measure mass is the triple beam balance

  14. Density • Shows a relationship between mass and volume • To calculate density we divide mass by volume • d=m/v • Units for density depend on size of object • Large objects = kg/L • Small objects = g/mL

  15. Bell Work 8/24/09 • What is mass? • What instrument is used to find mass? • What is density? • What is the formula used for density?

  16. Bell Work 8/25/09 • What units are most often used for mass? • What units are used for density?

  17. Temperature • Measured in degrees Celsius • Freezing = 0 degrees Celsius • Boiling = 100 degrees Celsius

  18. Bell Work 8/26/09 • What instrument is used to measure temperature? • What is the freezing point in degrees Celsius? • What is the boiling point in degrees Celsius?

  19. Bell Work 8/27/09 • How many centimeters are in 1 meter? • How many milliliters are in 1 liter? • How many centigrams are in 1 gram?

  20. Weight • Weight is the measure of attraction between objects due to gravity. • Basic unit of weight is the Newton (N)

  21. Tools for Measuring • A metric ruler is used to find length • A graduated cylinder is used to fine the volume of a liquid or an irregular solid • A metric ruler is used to find the volume of a rectangular object • A triple beam balance is used to find the mass of an object

  22. Bell Work 8/28/09 • 1000 g = ______ kg • 200 mL = ______ L • 1 m = ______ Dkm • 77 g = ______ mg

  23. Bell Work 8/28/09 • 25 kg = ______ mg • 345 cL = ______ HL • 980 m = ______ mm • 23700 g = ______ kg

  24. Bell Work 9/1/09 • 98 Hg = ______ mg • 222 KL = ______ L • 2706 mm = ______ Dkm • 5 g = ______ kg

  25. Bell Work 09/09/09 What is the base unit for the following? • Length • Volume • Mass

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