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What aspects of an object are measureable?<br />
Learning Target:Students will learn how to measure length accurately using customary and metric units and estimating them ...
Customary Units:inches (in.)foot (ft)yard (yd)mile (mi.)How they are related to one another:1ft = 12in.	1yd = 3ft = 36in.1...
Metric Units:millimeter (mm)centimeter (cm)meter (m)kilometer (km)How they are related to one another:1cm = 10mm	1m = 100c...
Common measuring tools:foot rulercentimeter ruleryardstickmetersticktape measureHow many units on are each?<br />
How many units on are each? foot ruler -12 inchescentimeter ruler – 30 centimetersyardstick – 3 footmeterstick – 100 centi...
Choose an appropriate measuring tool for the length. Explain your reasoning.1. Diameter of a circular pool.2. Diameter of ...
Answers: 1. Diameter of a circular pool.A tape measure; the pool’s diameter is greater than one yard an greater than one m...
Measure the length of the spoon to the nearest inch.http://www.future-edge.com/blackboard/MathM3B211/images/spoon.jpg<br />
Answer:4 in.http://www.future-edge.com/blackboard/MathM3B211/images/spoon.jpg<br />
Find the length of the object to the nearest centimeter and millimeter.Nearest centimeter = 3 cmNearest millimeter = 34 mm...
Find the length of the line segment to the nearest centimeter and millimeter.http://www.future-edge.com/blackboard/MathM3B...
Answer:5 cm51 mm http://www.future-edge.com/blackboard/MathM3B211/images/screw.jpg<br />
What benchmarks can we use to estimate the measure of an object?<br />
Benchmarks for Units of LengthCustomary Units:inch – length of a small paper clipfoot – distance from elbow to knuckleyard...
Choose an appropriate customary and metric unit for length. Explain your reasoning.1. width of our classroom2. distance ac...
Answer: 1. width of our classroom -feet, yards, or meters; the width is much greater than 1 in. or 1 cm and much less than...
Can you measure length accurately using customary and metric units and estimating them using benchmarks?<br />
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Transcript of "Sec. 2.1"

  1. 1. What aspects of an object are measureable?<br />
  2. 2. Learning Target:Students will learn how to measure length accurately using customary and metric units and estimating them using benchmarks. <br />
  3. 3. Customary Units:inches (in.)foot (ft)yard (yd)mile (mi.)How they are related to one another:1ft = 12in. 1yd = 3ft = 36in.1mi. = 1,760yd = 5,280ft<br />
  4. 4. Metric Units:millimeter (mm)centimeter (cm)meter (m)kilometer (km)How they are related to one another:1cm = 10mm 1m = 100cm = 1,000mm1km = 1,000m<br />
  5. 5. Common measuring tools:foot rulercentimeter ruleryardstickmetersticktape measureHow many units on are each?<br />
  6. 6. How many units on are each? foot ruler -12 inchescentimeter ruler – 30 centimetersyardstick – 3 footmeterstick – 100 centimeterstape measure – can vary but normally has both customary and metric units<br />
  7. 7. Choose an appropriate measuring tool for the length. Explain your reasoning.1. Diameter of a circular pool.2. Diameter of a car tire.Common measuring tools:foot ruler centimeter ruleryardstick metersticktape measure<br />
  8. 8. Answers: 1. Diameter of a circular pool.A tape measure; the pool’s diameter is greater than one yard an greater than one meter.2. Diameter of a car tire.Yardstick or meterstick; the tire’s diameter is greater than one foot and greater than 30 centimeters and less than one yard and less than one meter.<br />
  9. 9. Measure the length of the spoon to the nearest inch.http://www.future-edge.com/blackboard/MathM3B211/images/spoon.jpg<br />
  10. 10. Answer:4 in.http://www.future-edge.com/blackboard/MathM3B211/images/spoon.jpg<br />
  11. 11. Find the length of the object to the nearest centimeter and millimeter.Nearest centimeter = 3 cmNearest millimeter = 34 mmhttp://physicspmb.ukzn.ac.za/OnlineExercises/IntroVernier/Figures/Fig3.gif<br />
  12. 12. Find the length of the line segment to the nearest centimeter and millimeter.http://www.future-edge.com/blackboard/MathM3B211/images/screw.jpg<br />
  13. 13. Answer:5 cm51 mm http://www.future-edge.com/blackboard/MathM3B211/images/screw.jpg<br />
  14. 14. What benchmarks can we use to estimate the measure of an object?<br />
  15. 15. Benchmarks for Units of LengthCustomary Units:inch – length of a small paper clipfoot – distance from elbow to knuckleyard – width of a doorMetric Units:millimeter – thickness of a dimecentimeter – width of your little fingermeter – height of a chair <br />
  16. 16. Choose an appropriate customary and metric unit for length. Explain your reasoning.1. width of our classroom2. distance across town<br />
  17. 17. Answer: 1. width of our classroom -feet, yards, or meters; the width is much greater than 1 in. or 1 cm and much less than 1 mi. or 1 km2. distance across town –miles or kilometers; the width is much greater than 1 yd or 1 m.<br />
  18. 18. Can you measure length accurately using customary and metric units and estimating them using benchmarks?<br />
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