Topic: Measurement Aim: How can we measure mass and temperature? Do Now: Scientific Method questions (Hand in Lab Safety Activity) HW:

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Topic: Measurement Aim: How can we measure mass and temperature? Do Now: Scientific Method questions (Hand in Lab Safety Activity) HW:

10 cm 9 cm 8 cm V = L x W x H V = 10cm x 8cm x 9cm V = 720 cm 3

Example: V1 =11.5 mLV2 = 20 mL V = 20 –11.5 V = 8.5 mL

Amount of matter in an object Grams (g) TRIPLE BEAM BALANCE Mass

Mass = 542 gm

172 g

Measures temperature Tube filled with a fluid such as alcohol Thermometer

1.Fahrenheit Scale: Non-metric temp scale °F°F 2 scales used to measure temperature

Water freezes = 32°F Water boils = 212°F Human body temp = 98.6°F

2.Celsius Scale: Metric scale °C°C

Water freezes = 0°C Water boils = 100°C Human body temp = 37°C

Measuring with a thermometer 24°C

Let’s summarize… 1.What is the name of the instrument used to measure mass? 2.Identify the units used to measure mass. 3.What instrument is used to measure temperature? 4.Identify the two temperature scales used. Explain the difference between the two scales.

Mass = gm

Mass = 25.4 gm

Mass = 79.4 gm

Review: 1. Which piece of laboratory equipment would be used to obtain the most accurate measure of the volume of a glucose solution? a.triple beam balance b.graduated cylinder c.beaker d.metric ruler

2. Which piece of equipment could be used to determine the mass of a frog? a.triple beam balance b.graduated cylinder c.beaker d.metric ruler

3. Mass is best defined as the a.size of an object b.density of an object c.amount of matter in an object d.weight of an object

4. The amount of space an object takes up is known as its a.mass b.density c.volume d.matter

5. The units for the volume of a solid is a.mL b.mm c.L d.cm 3

6. The basic unit of volume in the metric system is the a.kilogram b.gallon c.liter d.mass

7. The basic unit of mass in the metric system is the a.kilogram b.gallon c.liter d.meter

8. To measure the volume of an irregular solid, a student can use a.a triple beam balance b.a beaker c.displacement in a graduated cylinder d.a thermometer

9. The volume of a liquid is 13.0 mL. What must a student do to obtain a volume of 12.5 mL of liquid in the graduated cylinder? a.Add 0.5 mL of liquid. b.Add 1.5 mL of liquid. c.Remove 0.5 mL of liquid. d.Remove 1.5 mL of liquid.