Standards of Measurement

Standards of Measurement

Brainstorming - What measurement tool would you use to measure the following?

• Mass of a ball?

• Volume of a glass of water?

• Length of your desk?

• How long it takes to clean your room?

Multiple Choice

m

• temperature

• length

• density

Multiple Choice

^oC, ^oF, K

• length

• temperature

• volume

Multiple Choice

kg

• length

• density

• mass

Multiple Choice

mL

• volume

• density

• length

Multiple Choice

g/ml and g/cm³

• volume

• length

• density

Standard: an exact quantity that people use to compare measurements.

Example: Two people measure the same object using the width of their hands. Each person will get a different measurement.

What do you think?

• Why is it important to have exact standards of measurement?

Two systems of measurement-

• English system - uses feet, gallons, pounds

• Metric system - uses meters, liters, grams

Volume: is the amount of space occupied by an object.

• Measured in ml, cm³, m³

• Volume is found by multiplying length(l) x width(w) x height(h)

Multiple Choice

Find the volume of a box that has a length of 15 cm, a width of 10 cm, and a height of 25 cm.

• 50 cm³

• 3750 cm³

• 3750 cm

To find the volume of a liquid, you read the bottom of the meniscus(the bottom of the semicircle)

If you guessed 26 ml, you are correct

Multiple Choice

What is the volume of the liquid in the graduated cylinder?

• 70 ml

• 71 ml

• 72 ml

• 74 ml

Measuring Mass and Density

• Matter: is anything that has mass and takes up space.

• Mass: is a measurement of the quantity of matter in an object.

Mass is measured in g or kg

• example - the mass of a paper clip is 1 g

• example - the mass of a my dog is 41 kg

Multiple Choice

Which unit is used to measure mass?

• grams

• meters

• milliliters

Multiple Choice

What is the amount of matter in an object called?

• volume

• density

• mass

Density

• How much matter is in an object.

• To figure it out, divide an objects mass by it's volume.

Multiple Choice

Which ball has more matter in it(which would be heavier?)

• bowling ball

• plastic ball

Fill in the Blanks

What are two objects that have about the same volume, but different masses?

Time

• interval between two points

• measured in seconds

Multiple Choice

What is something time measures?

• how far you travel

• how heavy you are

• how long it takes you to get someplace.

Temperature

• how hot or cold something is

• measured in Celcius ^oC, Fahrenheit ^oF, or Kelvin K

Multiple Choice

What instrument would you use to measure temperature?

• meterstick

• thermometer

• scale