CFA - Measurement

Science Measurements

Review

Measuring Length in Centimeters

• ​Longer lines represent centimeters

• ​Smaller lines represent millimeters

• ​1 cm = 10 mm

Multiple Choice

What is the length of the red line in centimeters

• 12.10 Centimeters

• 12.70 Centimeters

• 12.30 Centimeters

• 12.50 Centimeters

Multiple Choice

What is the length of the red line in centimeters

• 12 Centimeters

• 12.20 Centimeters

• 12.40 Centimeters

• 12.90 Centimeters

Multiple Choice

What is the length of the red line in centimeters

• .40 Centimeters

• .60 Centimeters

• .80 Centimeters

• One Centimeter

​Determining the Graduations:

1. Determine the values of the graduations

   1. ​Here the labeled graduations are 10, 20, and 30.

   2. ​The value between the labeled graduations is 10 mL, with 10 spaces. This means each space represents 1.

​

Measuring Volume of a liquid

• Determine the measurements on the graduated cylinder

  • Is it 10 mL, 100, mL, 500 mL

• ​Place the graduated cylinder on a level surface with the measurement lines facing you

  • ​The water in a cylinder will form a curve called the meniscus

• ​Find the bottom of the curved meniscus in the water. This should be in the center of the graduated cylinder.

  • ​Your eye should be level with the top of the liquid

• ​Follow the lowest point at the surface of the water to the wall of the graduated cylinder. Read the volumetric scale at this point.

​Determining the Volume

1. Reading the meniscus

   1. ​Be sure to look at eye level, to avoid parallax

​

​Eye Level - 75 mL

Looking from Above - 76 mL

Looking from Below - 74 mL

Fill in the Blanks

Determine the volume of the liquid

Fill in the Blanks

Determine the volume of the liquid

Fill in the Blanks

Determine the volume of the liquid

Volume With Water Displacement

1. Determine the volume of the water WITHOUT the object

2. ​Determine the volume of the water WITH the object

3. ​Subtract both values

4. ​The final answer will represent the volume of the rock

​Without Rock: 18 mL

​

​With Rock: 42 mL

​

​Volume of Rock : 24 mL

​(42 - 18 = 24 mL

Multiple Choice

What is the volume of water BEFORE the object was added

• 0.19 mL

• 19.0 mL

• 29.0 mL

• 0.29 mL

Multiple Choice

What is the volume of water AFTER the object was added

• 0.19 mL

• 19.0 mL

• 29.0 mL

• 0.29 mL

Multiple Choice

Find the volume of the object

Before Object: 19 mL

After Object: 29 mL

• 0.10 mL

• 21.0 mL

• 0.21 mL

• 10 mL

Multiple Choice

What is the volume of water BEFORE the object was added

• 0.64 mL

• 68.0 mL

• 64.0 mL

• 0.68 mL

Multiple Choice

What is the volume of water AFTER the object was added

• 0.64 mL

• 68.0 mL

• 64.0 mL

• 0.68 mL

Multiple Choice

Find the volume of the object

Before Object: 64 mL

After Object: 68 mL

• 0.59 mL

• 59.0 mL

• 4.0 mL

• 0.4 mL

Measuring Temperature

1. Determine the values on the thermometer

2. ​The red line on a thermometer is the line that indicates what the thermometer is set to.

​

​Example: Here the red line is between the 60 and 70 marks. In between those marks are 9 lines. This means the temperature of the liquid here is 68.

Fill in the Blanks

What is the temperature of the liquid here?

Fill in the Blanks

What is the temperature of the liquid here?

Fill in the Blanks

What is the temperature of the liquid here?

Measuring mass with triple beam balance scale

• ​The maximum weight a triple beam balance can measure is 600 grams.

  • ​The first beam can measure up to 10 grams.

  • ​The second beam can measure up to 500 grams, read in 100 g increments.

  • ​The third beam can measure up to 100 grams, read in 10 g increment

Measuring mass with triple beam balance scale

• ​Before you weigh something, ‘zero‘ the balance.

  • ​Do this by sliding back all the weight poises (that slide along the beams) so that the pointer is right at the zero line.

  • ​You might need to turn the zero adjustment knob a little bit to get it right at the line

  • ​Move the riders one by one (Hundreds, Tens, then one) Until the pointer lines back up with zero

Measuring mass with triple beam balance scale

• ​When measuring the mass add up all of the weights

  • ​Weight 1 : Hundreds

  • ​Weight 2: Tens

  • ​Weight 3: Ones

​

​

​Example:

​Weight 1 (Hundreds): 0

​Weight 2 (Tens): 80

​Weight 3 (Ones): 3.1

​Total weight: 83.1 g

Multiple Choice

What is the weight in the hundreds place

• 400 g

• 1.1 g

• 20 g

• 421.1 g

Multiple Choice

What is the weight in the tens place

• 400 g

• 1.1 g

• 20 g

• 421.1 g

Multiple Choice

What is the weight in the ones place

• 400 g

• 1.1 g

• 20 g

• 421.1 g

Fill in the Blanks

What is the total mass of the object if:

Weight 1: 400 g

Weight 2: 20 g

Weight 3: 1.1 g

Multiple Choice

What is the weight in the ones place

• 300 g

• 2.7 g

• 20 g

• 322.7 g

Multiple Choice

What is the weight in the hundreds place

• 300 g

• 2.7 g

• 20 g

• 322.7 g

Multiple Choice

What is the weight in the tens place

• 300 g

• 2.7 g

• 20 g

• 322.7 g

Fill in the Blanks

What is the total mass of the object if:

Weight 1: 300 g

Weight 2: 20 g

Weight 3: 2.7 g

Fill in the Blanks

What is the weight in the ones place

Fill in the Blanks

What is the weight in the tens place

Fill in the Blanks

What is the weight in the hundreds place

Fill in the Blanks

What is the total mass of the object?

Fill in the Blanks

What is the total mass of the object?

Fill in the Blanks

What is the total mass of the object?