Presentation on theme: "What tools do scientists use to measure length or distance?"— Presentation transcript:
1 What are some metric measurement tools that scientists use to make quantitative observations?
2 What tools do scientists use to measure length or distance? rulertape measuremeter stick
3 What is Length? Length- is the distance between two points. How long is the screw in centimeters?It is 5.1 centimeters.Remember to measure to the smallest place value the tool allows and use decimals.
4 Metric UnitskmmcmmmWhat are the metric units for measuring length or distance ?Units include the meter, centimeter and the millimeter.The basic unit of length in the metric system in the meter and is represented by a lowercase m.Metric Units1 Kilometer (km) = 1000 meters1 Meter = 100 Centimeters (cm)1 Meter = 1000 Millimeters (mm)Which is longer?A. 1 meter or 105 centimetersB. 4 kilometers or 4400 metersC. 12 centimeters or 102 millimetersD millimeters or 1 meter
5 1 centimeter = 10 millimeters Measuring LengthHow many millimeters are in 1 centimeter?1 centimeter = 10 millimetersWhat is the length of the line in centimeters? _______cmWhat is the length of the line in millimeters? _______mmWhat is the length of the line in centimeter? ________ HINT:Measure to the smallest place value the tool allows – use decimals.The line is 3.2 cm.Adapted from T. Trimpe
6 What tools do scientists use to measure volume? Measuring cupsGraduated cylindersBeakersMeasuring spoonsRulers or meter sticks or tape measures
7 cL mL L Metric Units What is volume? Metric Units Volume is the amount of space an object takes up.The base unit of volume in the metric system in the liter and is represented by L or l.Metric Units1 liter (L) = 1000 milliliters (mL)1 milliliter (mL) = 1 cm3 (or cc) = 1 gram (with water)Which is larger?A. 1 liter or 1500 millilitersB. 200 milliliters or 1.2 litersAdapted from T. Trimpe
8 Measuring VolumeGraduated cylinders are tools used to find the volume of liquids. Here’s how:Read the measurement based on the bottom of the meniscus or curve.* When using a real cylinder, make sure you are eye-level with the level of the water.What is the volume of water in the cylinder?43 mL*What causes the meniscus?The liquid in the graduated cylinder generally tends to stick to the sides of the cylinder. That is why for water and similar liquids we read the bottom.Adapted from T. Trimpe
9 Measuring Volume of Liquids What is the volume of liquid in each cylinder?CAB52 mL37 mL22.5 mLAdapted from T. Trimpe
10 Measuring Volume of Solids 10 cm9 cm8 cmWhat tool can be used to measure the volume of an object with the shape of a rectangular prism?We can measure using a ruler and the formula:length ___ x width ___ x height ___ = ______ cm3What can be used to measure thevolume of irregular shaped object (rock) ?Amount of H2O with object = ______ About of H2O without object = ______ Difference = (rock) Volume = ______water displacement usinga graduated cylinderAdapted from T. Trimpe
11 What tools do scientists use to measure mass? Pan balanceTriple Beam BalanceElectronic balance
12 Adapted from T. Trimpe 2008 http://sciencespot.net/ Metric UnitsgkgWhat is mass?Mass is the amount of matter in an object.The base unit of mass in the metric system in the gram and is represented by g.Metric Units1 Kilogram (km) = 1000 Grams (g)1 Gram (g) = 1000 Milligrams (mg)Which is larger?A. 1 kilogram or 1500 gramsB milligrams or 1 gramC. 12 milligrams or 12 kilogramsD. 4 kilograms or 4500 gramsAdapted from T. Trimpe
13 Measuring Mass – Triple-Beam Balance A triple-beam balance can be used to find the mass of various objects.– Slide the large weight to the right until the arm drops below the line. Move the rider back one groove. Make sure it “locks” into place.– Repeat this process with the top weight. When the arm moves below the line, back it up one groove.– Slide the small weight on the front beam until the lines match up.
14 What tools do scientists use to measure weight? Spring Scale
15 What is weight?Weight is the measure of the pull of gravity on an object.What units are used to measure weight?Newtons (N) and grams (g)
16 How to use a spring scale Hold the spring scale in one hand so that the hook is hanging downward.Be sure that you hold it high enough so you can see the scale clearly.Look at the center of the scale for the units the scale uses. It will be grams and /or Newtons.Check that round platform is set at zero (x) on the scale.Hook the object you are weighing onto the hook that hangs down from the scale. If there is a basket or pan suspended below the scale, place the object on the pan.Wait for the spring to stop moving up and down. Once it stops moving, look at the markings on the side of the scale and record the weight. On most scales it can be recorded in both grams and Newtons.
17 to how many Newtons will they measure? Look at the spring scale drawings below, upto how many Newtons will they measure?Each spring scale measures up to five Newtons (N).How many parts is each Newton divided into?ten partsHow manyNewtons?0.7 N
18 What are these WEIGHT measurements? BC3.4 N N N
19 What tools do scientists use to measure temperature? Thermometers
20 What is temperature?Temperature is a measure of how hot or cold something is.It is the measure of the heat or thermal energy in a substance.It is the average speed of the particles in a substance.
21 Measuring Temperature There are two different scales we will use to measure temperature.Fahrenheit scale – water freezes at 320 and boils at 2120FCelsius (centigrade) scale- water freezes at 00C and boils at 1000C
22 Brain Check Metric Unit Measurement Tool Ruler /Tape measure Balance Spring ScaleGraduated cylinderThermometerNewtonsDegrees CelsiusMillilitersGramsCentimeters*How does measurement help us know about the world?