Students in Mr. Smith's science class were studying chemical versus physical reactions. One sign of a chemical reaction is the formation of a precipitate. The students combined various ionic solutions, looking for precipitates. The results of their experiments are displayed in the data table. Sarah suggested that a longer wait time would produce different results. Sally said that time had nothing to do with whether or not a chemical reaction occurred. She added that maybe using warm solutions would indicate different results as the particles within the solutions would have more kinetic energy.

What comment would you make about the experiment and the students discussion?

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

not always but somethings can be reproduced in a laboratory.