## 3A. Instructional Delivery |

Evidence
1 |

Teaching the Concept of
Density: Constructing Knowledge and Addressing Misconceptions |

This
unit was based on the article by Doran and Burke in the Fall 2006
STANYS bulletin. In the article they outlined a unit to address
misconceptions about density in an inquiry focused manner. I also
tried to focus on constructing student knowledge by scoffolding what
they learned. My efforts attempted to match the outlined
curriculum (see below) as presented in the article. |

Doran,
Rodney and Burke, Kathleen. "Middle School Students'
Misconceptions About Density". The Science Teachers Bulletin
Volume 70. Number 1. Fall (2006) |

Worksheet developed for
Activity 5 (see above). Name_____________________________________________Date___________Per____ Oil and Water Procedure 1 Obtain materials as directed by your teacher. 2 Label one plastic medicine cup “oil” and the other “water” if they are not already labeled. Weigh each plastic cup and record the values at (A) and (B). 3 Measure 25 ml of oil in the graduated medicine cup labeled “oil” and record its mass at (D). Repeat using 30 ml of water in the remaining cup (C). 4 To find the actual mass of the oil and water subtract the empty cup mass from the mass of the cup and liquid as directed at (G) and (H) 5 Using the mass and volume measurements, calculate the density of the oil and water. Data Collection (A) Mass of Water Cup (empty) ________________ (B) Mass of Oil Cup (empty) ________________ (C) Mass of Water and Cup______________ (D) Mass of Oil and Cup________________ (E) Volume of oil 25 ml (F) Volume of water 30 ml (G) Mass of Water (C) – (A) _______________ (H) Mass of Oil (D) – (B) _________________ Density Calculations Density of oil = Mass of oil (H) = __________________ = ____________________ Volume of oil (E) Density of water = _Mass of water (G)_ = _______________=_____________________ Volume of water (F) Question Based on your observations during the demonstration, explain what happens to liquids with different densities when they are mixed together. ________________________________________________________________________ ________________________________________________________________________ |

Instructional Delivery |

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