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# Metric System - PowerPoint PPT Presentation

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

Measurement and SI

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?

• 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

• 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

• 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?

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

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 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.

• 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

• 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

• 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?

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 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

Please use complete sentences.

• What is mass?

• What instrument is used to measure mass?

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?

• 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

Find the density of an object with

1. m=50g

v=5mL

2. m=200kg

v=2L

• Measured in degrees Celsius

• Instrument = Theremometer

• Freezing = 0 degrees Celsius

• Boiling = 100 degrees Celsius

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?

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 is the measure of attraction between objects due to gravity.

• Basic unit of weight is the Newton (N)

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?

• 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

• 1000 g = ______ kg

• 200 mL = ______ L

• 1 m = ______ Dkm

• 77 g = ______ mg

• 25 kg = ______ mg

• 345 cL = ______ HL

• 980 m = ______ mm

• 23700 g = ______ kg

• 98 Hg = ______ mg

• 222 KL = ______ L

• 2706 mm = ______ Dkm

• 5 g = ______ kg

What is the base unit for the following?

• Length

• Volume

• Mass