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Warm up 02-19-14

Warm up 02-19-14. Question: What does a flat line on a position vs. time graph mean? Steep? Shallow? Answer: Flat = not moving Steep = fast Shallow = slow Goal: I will use a motion sensor to create and interpret graphs . Element of the day. 61 – Promethium – Pm

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Warm up 02-19-14

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  1. Warm up 02-19-14 • Question: What does a flat line on a position vs. time graph mean? Steep? Shallow? • Answer: • Flat = not moving • Steep = fast • Shallow = slow • Goal: I will use a motion sensor to create and interpret graphs.

  2. Element of the day • 61 – Promethium – Pm • Promethium, along with technetium (43) are the only two elements under 83 that have no stable isotopes. • Promethium was once used to create paint for luminous dials, but was replaced by tritium (an isotope of hydrogen). Tritium’s radiation is contained by the glass tubes it is kept in, and if they do break, it is lighter than air, so it floats away. Promethium does not have these advantages.

  3. Collect Warm ups • Smart Graphs Activities • Tonight’s HW • Pg BB & CC Agenda / HW

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