Today we marked the homework and then clarified any student questions related to measuring density or using density information to identify materials and predict sinking/floating. The small test on Thurs. will be very similar to the homework and the lab that they did in class with the five cylinders.
Can you? 1. use both the graduated cylinder and electronic scale properly 2. understand the concepts of mass vs. volume vs. density (we imagined what density would look like at the molecular level) 3. use the density formula to calculate density if you know an object's mass and volume 4. use displacement to determine volume of things that don't pour into graduated cylinders 5. analyze densities of different items and determine whether or not items are the same material - or - analyze densities to determine whether an object will float/sink in water - or - analyze densities to determine how different liquids might layer (float/sink) if they were carefully put together. 6. need to memorize density formula and pure water's density.
New info studied today - we got our textbooks out and read a short section (368-71) that compared fresh and ocean water. We used the Smartboard to show what we thought were most important ideas in each paragraph.
No homework - but everyone should study for the test and make sure they finished the notes on 368-71.
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