Review for Metric Test

​Review for Unit 1 Test

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• estimation of dimension, mass, and volume

• measuring dimension, mass, and volume

  • techniques/how to actually measure

  • units to use

  • choosing proper device to use

• metric prefixes & magnitude

• conversions/dimensional analysis

​Estimating LENGTH

​Milken --> Disneyland: 71 km

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football field length: 90 m

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From bottom of door to middle: 1 m

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$1 bill: 15.60 cm x 6.63 cm

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pencil: 19 cm

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thickness of dime: 1 mm

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human hair: 7 μm

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Open Ended

Estimate dimensions of a laptop:

1. length

2. width

3. thickness/height

​1.56 cm

30.41 cm

21.24 cm

​small car: 1300 kg

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bike: 10 kg​

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cat: 5 kg

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volleyball: 270 g

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cell phone: 170 g​

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quarter coin: 5 g

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cotton ball: 600 mg​

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​Estimating MASS

Open Ended

Estimate the mass of a laptop.

​1.29 kg

​Estimating VOLUME

avg person: 62 kL or 62,000 cm³

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brain:​ 1400 cm³

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​gallon of milk: 3.79 L

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can of soda: 355 mL

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juice box: 200 mL

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eye drop bottle: 10 mL​​

Open Ended

Estimate the volume of a laptop.

​1,007.61 cm³

1,007.61 mL

1.01 L​

Fill in the Blanks

When measuring the volume of liquid, we use a tool called a _____ ______

Draw

Write your answer to the question in the box.

​20.75 cm

Multiple Select

Select all of the answers that are TRUE about this picture.

• The plastic weigh boat has a mass of 2.87 L.

• She is probably pushing the zero/tare button to reset the absolute zero of the balance.

• The electronic balance is used to measure mass in grams.

Open Ended

Look at the picture and fill in the blanks (number your responses like this):

1.

2.

3.

4.

​graduated cylinder

​displacement

​ruler

​formula

Multiple Select

Select that answers that correctly match the measurement with its BASE UNIT.

• dimension: centimeters (cm)

• mass: grams (g)

• volume: liters (L)

Multiple Choice

True or false: For volume and dimension measurements, our measurement should have two numbers after the decimal place (e.g. 20.30 cm or 42.90 mL). For mass measurements, we write the number that the balance says.

• True

• False

Draw

Fill in the m prefix and symbols.

​I need 12 volunteers.

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As a class, we need to line them up in order of LARGEST to SMALLEST metric prefixes​

​Solving dimensional analysis problems (converting between units)

1. Write down your starting point (what we're converting from) in parentheses with units

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2. In your next parentheses, write down the unit you want to convert to on the top and the one you want to cancel on the bottom (things cancel if they're on the top and bottom)

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3. Put a 1 in front of the bigger unit

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4. Use k h da b d c m​ to finish the conversion factor --> multiply the 10s and put that number in front of the smaller unit

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5. cross out units that cancel & multiply across (top multiplies with top, bottom multiplies with bottom)

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6. simplify or divide your answer if needed; don't forget your units

​Get out a piece of paper...

Draw

Either on your paper or this slide, convert 150 km to cm. SHOW YOUR WORK and then BOX your answer on the slide.

Draw

Convert 20 B to mB.

Draw

Convert 180,000 mV to daV.

Draw

Convert 20 days to seconds