Measurment

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# Measurment - PowerPoint PPT Presentation

Measurment. Science 8 Ms. Drake Brookville Intermediate School. Measurement. A way to describe objects and events with numbers; quantitative description. Standards of measurement needed to be universal; they need to be agreed upon by people all over the world.

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## PowerPoint Slideshow about ' Measurment' - clark-sanders

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### Measurment

Science 8

Ms. Drake

Brookville Intermediate School

Measurement
• A way to describe objects and events with numbers; quantitative description.
• Standards of measurement needed to be universal; they need to be agreed upon by people all over the world.
• Every measurement has a number and UNIT!!
Rounding
• Look at the digit to the right of the place being rounded
• If digit is 0-4, digit being rounded stays the same
• If digit is 5 or more, digit begin rounded increases by 1
• Look at the digit being rounded to. Then look at the digits to its right. If those digits are to the right of a decimal, they are removed. If they are to the left of a decimal change them to zeros.
International System- SI
• Metric system
• Easier to use than the standard English system
• System represents multiples of 10; DO NOT use fractions
• Some units include: meter, kilogram, liter, and second
Linear System
• Length, Width, Height
• Tools: Ruler, Meter Stick, Tape Measurer

Unit: METER

Linear System
• For Solid Regular Objects
• Perimeter- distance around the object (meter)
• Area- length * width (meter squared)
• Volume- length* width* height (meter cubed)
• Circumference- distance around a circle (meter)
Volume
• How much space matter

occupies

Unit: LITER

• Water in a graduate has a curved surface called the meniscus. You always read the graduated cylinder at eye level.
Hint:
• Always check the unnumbered marks on a graduate to see how many sections there are and what they measure.
Volume of Irregular-Shape Objects
• We use a method called water displacementto determine their volume. Displacement is the change in the height of water when a non-regular shape is added.
• Put some water in a graduate. Record the volume of the water. This is your initial volume.
Carefully slide the object into the graduated cylinder and record the new volume level. This is your final volume.
• Subtract the initial volume from the final volume and you have the volume of the object.

Initial Volume

Final Volume

Mass
• The amount of matter an object has
• Tools: Balance, Scale

Unit: GRAM

• Use a triple-beam balance to measure an object’s mass.
Time
• How long it takes an event to happen
• Tools: Stop Watch or Clock

Unit: HOURS, MINUTES, SECONDS

Temperature
• The measure of how hot or cold something is
• Tools: Thermometer

Unit: C

• H20 freezes at 0 degrees Celsius and boils at 100 degrees Celsius.
Density
• Density is a comparison of how much matter there is in a certain amount of space.
• People in a square: Which square is more dense?
What is Density?
• Density = mass OR mass ÷ volume.

volume

• Units for density: g .

cm3

ALWAYS REMEMBER UNITS!

Let’s try a denisty problem together. . .
• Frank has a paper clip. It has a mass of 9 g and a volume of 3 cm3. What is its density?
• Frank also has an eraser. It has a mass of 3 g, and a volume of 1cm3. What is its density?
Work on these problems with your table group. . .
• Jack has a rock. The rock has a mass of 6 g and a volume of 3 cm3. What is the density of the rock?
• Jill has a gel pen. The gel pen has a mass of 8 g and a volume of 2 cm3. What is the density of the rock?
Try these on your own. . .
• Al’Licia has a watch. It has a mass of 4 g and a volume of 2 cm3. What is the density of the watch?
• Mia has a wallet. It has a mass of 15 g and a volume of 5 cm3. What is the density of the wallet?
Liquid Layers
• If you pour together liquids that don’t mix and have different densities, they will form liquid layers.
• The liquid with the highest density will be on the bottom.
• The liquid with the lowest density will be onthe top.
Liquid Layers
• Which layer has the highest density?
• Which layer has the lowest density?
• Imagine that the liquids have the following densities:
• 10g/cm3. 3g/cm3.
• 6g/cm3. 5g/cm3.
• Which number would go with which layer?
Liquid Layers- Try with your neighbor
• Which liquid has the highest density?
• Which liquid has the lowest density?
• Which liquid has the middle density?
Liquid Layers- Now try on your own!
• Imagine that the liquids on the right have the following densities:
• 15g/cm3 10g/cm3
• 3g/cm3 9g/cm3
• 7g/cm3 12g/cm3
• Match the colors to the correct densities