tag:blogger.com,1999:blog-823646357326613260.post199149304937144156..comments2023-05-09T09:58:34.804-04:00Comments on At Home Science: Science Saturday Challenge #4Krishttp://www.blogger.com/profile/04413921190654038723noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-823646357326613260.post-85810642189682615242009-05-11T17:05:00.000-04:002009-05-11T17:05:00.000-04:00Hi Kris - I'm from Steve Spangler Science. Thank y...Hi Kris - I'm from Steve Spangler Science. Thank you for the link to our test tube set. I know I am partial, but it is a really great, sturdy set. <br /><br />You have a lot of fun science experiments on your site. I want to check them out for my own Science Saturdays. <br /><br />Did you know you can get a widget from Steve Spangler Science for your blog that shows our experiment of the week? You can get it at: http://www.widgetbox.com/widget/science-experiment-of-the-week-from-steve-spanglerSusan Wellshttps://www.blogger.com/profile/18032828626511244187noreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-88573676407249223342009-03-01T20:35:00.000-05:002009-03-01T20:35:00.000-05:00He, he, he I can see how that would fit in--very c...He, he, he I can see how that would fit in--very cute!Krishttps://www.blogger.com/profile/04413921190654038723noreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-5654759042772567472009-02-28T07:12:00.000-05:002009-02-28T07:12:00.000-05:00We just had a wonderful time trying out your exper...We just had a wonderful time trying out your experiment. One of the kids thought that the difference could be in the color of the dye rather than the temperature of the water so we tried it again using the same color in each tube. <BR/><BR/>This fit in well with our Unit Study on King Bidgood's in the Bathtub.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-86532782411591721302009-02-26T12:57:00.000-05:002009-02-26T12:57:00.000-05:00Neat--I gotta get me one of those hydrometers ;o)T...Neat--I gotta get me one of those hydrometers ;o)<BR/><BR/>The hot and cold difference is better appreciated with different color dyes--you can really see dark dye just sitting around the bottom. I also held the test tubes under very cold or very hot water before filling them to make a really large temperature difference.<BR/><BR/>I'm glad you had fun with it!Krishttps://www.blogger.com/profile/04413921190654038723noreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-43739614658448379492009-02-26T11:23:00.000-05:002009-02-26T11:23:00.000-05:00Thanks Kris,We did this experiment last night. My...Thanks Kris,<BR/><BR/>We did this experiment last night. My younger son was not convinced that the dye in the hot water spread out faster than the cold, even though we did it multiple times. We used baby food jars, so maybe test tubes would have made things easier to see.<BR/><BR/>We are taking turns setting up the experiments and being the "scribe". My husband set this one up and at the end he showed, by using the hydrometer from an old beer making kit, how the density varied. VERY noticable difference between the salt and regular water!<BR/><BR/>Great experiment. Thanks!<BR/>Sarahdstbhttps://www.blogger.com/profile/12640426092185071874noreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-37637036005925323372009-02-22T07:01:00.000-05:002009-02-22T07:01:00.000-05:00I demonstrated two concepts, which is why it may b...I demonstrated two concepts, which is why it may be a little confusing. The first is density. Brine is more dense than water; a neat way to show this is to fill a measuring cup to, say, the 1/2 c mark with hot water and then add a tablespoon of salt. Ask Sprite to see how the volume changes when the salt is added--it doesn't! That's because the liquid is becoming more dense (more mass, same volume.) That's why the blue dye just floats on top of the brine, because it is less dense than brine. Compare that to how the dye sinks into the hot and cold water.<BR/><BR/>The hot and cold test tubes demonstrate how heat energy makes molecules move faster. The dye diffused throughout the hot water much faster than the cold water where the dye just sat at the bottom.<BR/><BR/>You can get the test tubes and rack from <A HREF="http://www.stevespanglerscience.com/product/1389" REL="nofollow">Steve Spangler Science </A> for $6, though I don't know what the shipping will be to you!Krishttps://www.blogger.com/profile/04413921190654038723noreply@blogger.comtag:blogger.com,1999:blog-823646357326613260.post-51166549435312962802009-02-21T22:01:00.000-05:002009-02-21T22:01:00.000-05:00That is neat. I've bookmarked this as we'll be beg...That is neat. I've bookmarked this as we'll be beginning chemistry soon. I don't really understand the concepts here; I guess I'll have to study your links and such.<BR/><BR/>I love your cute test tube set! I want that!Anonymoushttps://www.blogger.com/profile/09628472484731723590noreply@blogger.com