Cleaning up: show children why soap is needed for washing. (When Children Ask "Why?").Children do not know why we use soap for washing. Why not let them show themselves? It is a lesson they will never forget. And everyone will be healthier as a result. Materials: clear cup, 1/2 cup water, 1/2 cup vegetable vegetable, term originally used for any plant, now the name for many food plants, most of them annuals, and for their edible parts. There is no clear botanical distinction between vegetables and fruits. oil, 1 tbsp liquid handwashing handwashing, n a fundamental part of standard precaution procedures and disease control for dental personnel; helps reduce or prevent infection and transmittal of microbes among people and objects; for regular dental procedures, liquid soap and water is soap, spoon spoon, n an instrument with a round or ovoid working end; designed to be used for scraping or scooping. . (Measurements do not have to be exact.) Pour the water and oil into the cup; the oil will float to the top. Show children how oil and water do not mix. (The bonds on the surface of the oil repel re·pel v. re·pelled, re·pel·ling, re·pels v.tr. 1. To ward off or keep away; drive back: repel insects. 2. those on water molecules.) Now add the soap and mix the solution together. What happens? The oil stays mixed with the water and soap because the soap creates bonds on the surface that do not repel the water. Why wash with soap? Most of the dirt and grime on our hands are bonded to oil particles <onlyinclude> This is a list of particles in particle physics, including currently known and hypothetical elementary particles, as well as the composite particles that can be built up from them. on the skin. Water alone will not wash off the dirt because oil repels water. But add soap and all the dirt can mix with the water and be removed. For additional Healthy Kids Experiments, visit www.ScienceSpiders.com. Reprinted from Media Newsletter, from PlayAndTeach |
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