Measuring Length

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Measuring Length Mass

• By
• Brianna Shields
• September 13, 2005

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DO NOW

• Lab Safety Quiz
• You have 10 minutes to finish
• The five pieces of equipment are on the front
  counter
• Place your quiz on the counter when finished

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Length

• Definition

• Distance between two points

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Length

• Tool

• Ruler or meterstick

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Length

• Label units

• Centimeter (cm)

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Length

• Tips

• Line object up at zero mark
• Measure with decimals (no fractions)
• Be accurate
• Label your answer

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Example

• What is the length of the object at left?

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Example

• What is the length of the object at left?

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Example

• What is the length of the object at left?

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Mass

• Definition

• Amount of matter in an object

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Mass

• Tool

• Triple beam balance

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Mass

• Label units

• Grams (g)

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• Using a tbb

• 1. Zero the balance (all masses left)

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• Using a tbb

• 2. Move 100 g mass first- until balance tips,
  then slide mass one spot left

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• Using a tbb

• 3. Move 10 g mass next until balance tips, then
  slide mass one spot left

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• Using a tbb

• 4. Move 1 g mass last until balance tips, then
  slide mass one spot left

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• Using a tbb

• 5. Add up all three masses to find the total mass

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Mass

• Tips

• Be accurate
• Use decimals, no fractions
• Label your answer correctly

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Example

• What is the mass of the object to the left?

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Example

• What is the mass of the object to the left?

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Practice

• Work with your lab partner
• Complete the length and mass practice questions
  in your handout
• We will go over the correct answers at the end of
  the period

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Hands On Length
Plastic Knife cm
Straw cm
Toothpick cm
Pencil cm
Paperclip cm
Wooden Dowel cm
Thermometer cm
Battery cm
Bobby Pin cm
Twist Tie cm
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Hands On Mass
Egg 1 g
Egg 2 g
Egg 3 g
Egg 4 g
Egg 5 g
Egg 6 g
Egg 7 g
Egg 8 g
Egg 9 g
Egg 10 g
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Practice Length Mass
1. Find the length of the nail. Round to the nearest tenth, label using the proper units. 1. Length of the nail
2. Find the height of the plant. Round to the nearest tenth, label using the proper units. 2. Height of the plant
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Practice Length Mass
3. Find the length of the paperclip. Round to the nearest tenth, label using the proper units. 3. Length of the paperclip
4. Find the mass of the unknown object by adding up the masses. Round to the nearest tenth, label using the proper units. 4. Mass of the unknown
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Practice Length Mass
5. Find the mass of the cereal bowl. Round to the nearest tenth. Label using the proper units. 5. Mass of the cereal bowl