![]() Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. ![]() Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. See what other experiments you can try with the oobleck and enjoy your messy science! If you punch the sand, it doesn’t move, but you can wiggle a finger into the sand fairly easily. It can be helpful to explain it to children like sand at the beach. When you move through it slowly, the particles of corn starch have time to move away and “slip” around the object. This is because the pressure forces all the particles of corn starch together and they behave like a solid. Oobleck behaves like a solid when force is acted on it quickly. Oobleck is a mixture of a solid (corn starch) suspended in a liquid (water). You can watch a video of this experiment being done at Michigan Tech. If you are really ambitious, and have a lot of cornstarch, you can mix the material in a kiddy pool and try “walking on water.” This might be good for a larger event like a county fair.Try hammering a nail into the board on both the water and the oobleck. Take a small board that will float on water.“Oh no! I am sinking in quicksand!” What happens and why? Then have them set the action figures on top. Take action figures or dolls with hard feet and have the kids “jump” the figures across the bowl quickly and forcefully.Turn on the speaker and watch it “dance.” You can add food coloring while doing this for a neat effect. Put some in a rimmed cookie sheet on a subwoofer speaker.What happens? What happens when you aren’t squeezing it tightly? Take a fistful of the oobleck and hold it as tight as you can in your hand.Try stabbing it quickly or slowly slicing it. How can it pour when it seems solid? Does the speed at which you pour make a difference? Pour it slowly from one bowl to another.Punch it! Does your fist go in? Why or why not?.This might be a good activity to do outside on a nice day and hose off afterward. Here are some things to try with the oobleck: WARNING! This is messy! Washing it down the drain might clog your pipes. You may try it with a spoon, but I found you need to use your hands. The formal name for this is a non-Newtonian fluid. ![]() There is a substance that exhibits the properties of both a solid and liquid called oobleck. Can be compressed to fit in a smaller space.May turn to a liquid if it gets cold enough (condensation).May turn to a solid if it gets cold enough (freezing). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |