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Metric System. Measurement and SI. Bell Work 8/16/10. Please get our your signed syllabus sheet Please get a peach bell work sheet and begin answering the following questions in complete sentences What instrument is used to measure length?

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Metric system

Metric System

Measurement and SI


Bell work 8 16 10
Bell Work 8/16/10

Please get our your signed syllabus sheet

Please get a peach bell work sheet and begin answering the following questions in complete sentences

  • What instrument is used to measure length?

  • Why do you think it is important to know how to measure length?


Metric system1
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


Length
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


Bell work 8 17 10
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?


Homework 8 17 10
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


Bell work 8 18 10
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:


Volume
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.


Volume cont
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


Volume cont1
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


  • Bell work 8 19 10
    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?


    Bell work 8 20 10
    Bell Work 8/20/10

    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?


    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


    Bell work 8 23 10
    Bell Work 8/23/10

    Please use complete sentences.

    • What is mass?

    • What instrument is used to measure mass?


    Bell work 8 24 10
    Bell Work 8/24/10

    Please use complete sentences.

    • What basic units do we use to measure volume?

    • What basic units do we use to measure length?

    • What basic units do we use to measure mass?


    Density
    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


    Bell work 8 25 10
    Bell Work 8/25/10

    Find the density of an object with

    1. m=50g

    v=5mL

    2. m=200kg

    v=2L


    Temperature
    Temperature

    • Measured in degrees Celsius

    • Instrument = Theremometer

    • Freezing = 0 degrees Celsius

    • Boiling = 100 degrees Celsius


    Bell work 8 26 10
    Bell Work 8/26/10

    Please DO NOT touch the microscopes!!!

    • What instrument is used to measure temperature?

    • What is the freezing point in degrees Celsius?

    • What is the boiling point in degrees Celsius?


    Bell work 8 27 10
    Bell Work 8/27/10

    Find the density of the following objects

    • m = 20 g v = 4 mL

    • m = 60 kg v = 2 L

    • m = 8 g v = 8 mL


    Weight
    Weight

    • Weight is the measure of attraction between objects due to gravity.

    • Basic unit of weight is the Newton (N)


    Bell work 8 30 10
    Bell Work 8/30/10

    Please get a new pink bell work sheet from the counter by the sinks.

    • What is weight?

    • What unit is weight measured in?

    • How many centimeters are in a meter?


    Tools for measuring
    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


    Bell work 8 31 10
    Bell Work 8/31/10

    • 1000 g = ______ kg

    • 200 mL = ______ L

    • 1 m = ______ Dkm

    • 77 g = ______ mg


    Bell work 8 28 09
    Bell Work 8/28/09

    • 25 kg = ______ mg

    • 345 cL = ______ HL

    • 980 m = ______ mm

    • 23700 g = ______ kg


    Bell work 9 1 10
    Bell Work 9/1/10

    • 98 Hg = ______ mg

    • 222 KL = ______ L

    • 2706 mm = ______ Dkm

    • 5 g = ______ kg


    Bell work 09 09 09
    Bell Work 09/09/09

    What is the base unit for the following?

    • Length

    • Volume

    • Mass


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