8/26 Bellwork TrialsTrackDistance Amount of Time 1 Classroom floor10m8 sec 2 Classroom floor20m12 sec 3 Classroom floor30m19 sec 4 Classroom floor40m26.

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Presentation transcript:

8/26 Bellwork TrialsTrackDistance Amount of Time 1 Classroom floor10m8 sec 2 Classroom floor20m12 sec 3 Classroom floor30m19 sec 4 Classroom floor40m26 sec 5 Classroom floor50m33 sec 1. What is the independent variable in this data table? 2. What is the dependent variable in this data table?

8/26/13  Measurement Tools

Length  Length- is the distance between two points.  We use a metric ruler to measure length.  The standard unit of length we use is the meter (m).

What is Volume?  Volume is the measure of the capacity of a container.  It is the measure of how much a container of a particular shape will hold - liquids, dry substances, etc.  Tool- graduated cylinder  Standard unit is Liter (L)

Measuring Mass  Mass is the amount of matter in an object  Matter is some thing that has mass and takes up space  Mass is measured in grams (g) and kilograms (kg)  1 paper clip =1 gram  1000g = 1kg

Tools for measuring Mass  The triple beam balance

How to use a triple beam balance  1) Make sure that the balance scale is at zero.  2) Place object on balance and move the largest rider one notch at a time until the beam drops. (100’s spot) Move the rider back one notch (make sure it locks in place)  3) Move the next largest rider until the beam drops (10’s spot). Back it up one notch.  4) Move the smallest rider (1’s spot) until the beam swings equally above and below the zero mark.  5) Add up all the numbers to find the mass!

Calculate The Mass

Spring scale- a balance that measures weight by the tension on a helical spring A spring scale is used to measure force such as weight. Unit= Newtons

Mass Vs Weight Mass does not depend on gravity The mass of an object always remains the same Weight depends on gravity Weight equals Mass X gravity The weight of an object changes if the pull of gravity changes

Temperature We use a thermometer to measure temperature. While we are use to measuring temperature in Fahrenheit, the rest of the world uses Celsius. Kelvin is another unit for temperature.

Density  The quantity of something per unit measure, especially per unit length, area, or volume.  Units= grams per cubic centimeter or g/cm^3  Formula: density=mass/volume or d=m/v

1.Frank has a paper clip. It has a mass of 9g and a volume of 3cm^3. What is its density? 2.Frank also has an eraser. It has a mass of 3g, and a volume of 1cm^3. What is its density? 3.Jack has a rock. The rock has a mass of 6g and a volume of 3cm^3. What is the density of the rock? 4.Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm^3. What is the density of the rock? 5.Alicia has a watch. It has a mass of 4g and a volume of 2cm^3. What is the density of the watch? 6.Mia has a wallet. It has a mass of 15g and a volume of 5cm^3. What is the density of the wallet?