4 When and why was the metric system invented? The metric system was invented in 1790The metric system was invented because countries were using many different systems of measurement causing confusion and lack of consistencyThe metric system was invented by a group of French scientistsaunes, cubits, leagues, palms, stadia, furlongs, rods, pecks
5 Metric SystemA system of measurement used by the majority of countries on Earth based on the number 10Countries that don’t use the Metric System…Liberia, Myanmar, and United States
6 Scientists all over the world use the International System of Units to measure: LengthVolumeMass
7 Key Concept: Why do scientists use a standard measurement system? Allows scientists to compare data and communicate with each other about their resultsAlso allows experiments to be repeated
19 How does a triple-beam balance work? A triple-beam balance works by comparing the mass of the object you are measuring to a known massWhen you use a triple-beam balance, you:Place the object on the panShift the riders on the beams until them balance the mass of the objectStart with the large rider (increments of 100)Next, the medium sized rider (increments of 10)Lastly, the small rider (increments of 1)
20 Figure 3: Observing - What is the mass of this turtle? 153.7 grams
21 Why do scientists prefer to use the mass of an object instead of its weight? Scientists prefer to use an objects mass instead of its weight because mass does not change when the force of gravity does
22 Label the different parts of the triple-beam balance.
23 Label the different parts of the triple-beam balance. Pan
24 Label the different parts of the triple-beam balance. PanRiders
25 Label the different parts of the triple-beam balance. BeamsPanRiders
26 Label the different parts of the triple-beam balance. BeamsPanRidersPointer
35 How can the volume of a solid object such as a shoebox be measured? To measure a solid objects that are regular shaped, a formula for volume can be applied
36 The Metric System unit known for measuring solids with a larger volume is known as the… Cubic meter (m³)Cubic centimeter (cm3)Cubic millimeter (mm3).
37 Volume = Length x Width x Height Tool: The formula for calculating the volume of a rectangular object is:Volume = Length x Width x Height
38 Why is the unit cm³ used when calculating the volume of a rectangular object? When multiplying the object’s length, width and height, the cm units are also multipliedcm x cm x cm = cm³
39 Volume = Length x Width x Height Suppose a cereal box is 10 centimeters long, 4 centimeters wide, and 20 centimeters high. What would be the volume of the box?Volume = Length x Width x HeightVolume = 10 cm x 4 cm x 20 cmVolume =
41 How is the volume of an irregular solid such as a rock measured? To measure the volume of an irregular solid, immerse the object in water, and measure how much the water level risesTool (Method) : Water displacement method using a Graduated Cylinder
42 Basic Unit of Volume for Irregular Solids = cL3mL3
43 How does the water displacement method work? Record the volume of water in the graduated cylinderCarefully place the irregular solid into the water. Record the volume of the water plus the objectSubtract the volume of the water alone from the volume of the water plus the object
44 King Henry Died Basically Drinking Chocolate Milk To convert to a smaller unit, move the decimal point to the rightBasic Unit1 Meter1 Liter1 GramKilo1000UnitsHecto100UnitsDeka10UnitsDeci0.1UnitsCenti.01UnitsMilli.001UnitsTo convert to a larger unit, move the decimal point to the leftKing Henry Died Basically Drinking Chocolate Milk
45 TRY THIS USING THE STAIRCASE METHOD 1000 mg = ______ g1Step 1: Determine if you are going to go up or down the ladder.Step 2: Determine how many steps there are from milligrams tograms.Step 3: Move the decimal point the amount of places that wasdetermined in steps 1 & 2.
46 TRY THIS USING THE STAIRCASE METHOD .15 L = __________ ml
47 TRY THIS USING THE STAIRCASE METHOD .15 L = __________ ml150
50 Bell RingerWhat are the basic units of measurements forLengthVolumeMassConvert 1.5 km to mConvert 120 ml to clWhat tool would you use to measure mass?What is the formula for figuring volume of an rectangular shaped object?