Measurment
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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.

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Measurment

Measurment

Science 8

Ms. Drake

Brookville Intermediate School


Measurement

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

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

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

Linear System

  • Length, Width, Height

    • Tools: Ruler, Meter Stick, Tape Measurer

      Unit: METER


Linear system1

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

Volume

  • How much space matter

    occupies

    • Tools (liquid): Graduated Cylinder, Beaker, Flask

      Unit: LITER


Using a graduated cylinder

Using a Graduated Cylinder

  • Water in a graduate has a curved surface called the meniscus. You always read the graduated cylinder at eye level.


Measurment

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

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.


Measurment

  • 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


Measurment

Mass

  • The amount of matter an object has

    • Tools: Balance, Scale

      Unit: GRAM

  • Use a triple-beam balance to measure an object’s mass.


Measurment

Time

  • How long it takes an event to happen

    • Tools: Stop Watch or Clock

      Unit: HOURS, MINUTES, SECONDS


Temperature

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.


Tools of the trade

Tools of the Trade


Density

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?


Measurment

  • Now which one is more dense?


What is density

What is Density?

  • Density = mass OR mass ÷ volume.

    volume

  • Units for density: g .

    cm3

ALWAYS REMEMBER UNITS!


Let s try a denisty problem together

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

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

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

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 layers1

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

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

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


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