Showing Precision in Measurements

Can this balance be read to the nearest milligram? Yes or No

Yes

What is the mass measurement shown on the scales of this balance? a. 73.923g b. 70.392 g c. 73.92g d. 70.923 g

a. 73.923g

Determine the length of the object shown. a. 97.8 mm b. 97.80 mm c. 97 mm d. 98 mm

a. 97.8 mm

Determine the volume of fluid in the graduated cylinder shown. a. 22 mL b. 22.5 mL c. 23 mL d. 23.0 mL

b. 22.5 mL

Determine the volume of fluid in the graduated cylinder shown. a. 47.5 mL b. 47.3 mL c. 47 mL d. 47.7 mL

b. 47.3 mL

Determine the length of the object shown. a. 5.6 cm b. 5.60 cm c. 5.600 cm d. 6 cm

b. 5.60 cm

What is the smallest division on this balance? a. 1g b. 0.1g c. 0.01g d. 0.001g

c. 0.0g

Determine the length of the object shown. a. 1.2 cm b. 1.3 cm c. 1.25 cm d. 1.250 cm

c. 1.25 cm

Determine the volume of the fluid in the graduated cylinder shown. a. 12.7 mL b. 12.8 mL c. 12.78 mL d. 12.88 mL

c. 12.78 mL

Determine the length of the object shown. a. 7 cm b. 7.2 cm c. 72.5 mm d. 72.50 mm

c. 72.5 mm

Determine the volume of fluid in the graduated cylinder shown. a. 8.135 mL b. 8.15 mL c. 8.13 mL d. 8.23 mL

c. 8.13 mL

Read the scales of this balance. The unknown sample has a mass of: a. 1.012g b. 1.220g c. 11.2g d. 1.200g

d. 1.200g

𝗣𝗶𝗰𝗸 𝘁𝗵𝗲 𝗧𝗪𝗢 𝘁𝗿𝘂𝗲 𝘀𝘁𝗮𝘁𝗲𝗺𝗲𝗻𝘁𝘀 𝗳𝗿𝗼𝗺 𝘁𝗵𝗲 𝗳𝗼𝗹𝗹𝗼𝘄𝗶𝗻𝗴: ◻️ Graduate cylinders are used to measure volume ◻️ All graduated cylinders measure liquids with the same precision ◻️ Graduated cylinders are the only instruments used to measure volume in the laboratory. ◻️ Always read a graduated cylinder from the bottom of the meniscus.

◻️ Graduated cylinders are used to measure volume. ◻️ Always read a graduated cylinder from the bottom of the meniscus.

Accuracy is the correctness of a measurement. True or False

True

Precision is related to the uncertainty in a measurement. True or False

True

Your data and observations will be only as good as your care in measuring. True or False

True