Title: Mentos, Soda, and Nucleation
In this lesson, Mentos candy and different types of soda are used to show examples of nucleation, surface tension, surface area, polar attractions, and supersaturated materials. A video will be used to show the examples and the students will then work in groups to determine what their hypothesis is about what is happening and why. The students will be given a chance to debate with other students about why their hypothesis is correct. This lesson could be used in eighth grade physical science, physical science, chemistry, and/or physics.
Standard(s): [S1] (8) 1: Identify steps within the scientific process.
Title: Separation of a Mixture
Students will use their knowledge of physical properties to separate a mixture of four ingredients. The students are required to design their own laboratory procedure for separating the mixture. The separation process itself encourages mastery of several laboratory techniques.
Standard(s): [SC2015] PSC (9-12) 1: Use the periodic table as a model to predict the relative properties and trends (e.g., reactivity of metals; types of bonds formed, including ionic, covalent, and polar covalent; numbers of bonds formed; reactions with oxygen) of main group elements based on the patterns of valence electrons in atoms.
Title: Qualitative Analysis Project
Students, working in groups, will identify four unknown substances using analysis procedures practiced in the lab throughout the school year. They will collect data, research the unknown substances, and report findings in a slideshow presentation and web page, and collect an industry brochure.
Standard(s): [TC2] CA2 (9-12) 11: Critique digital content for validity, accuracy, bias, currency, and relevance.
Title: Pizza Cheese
In this Science Update, from Science NetLinks, you'll hear why the cheese on pizza tastes different when it is reheated versus when it is originally baked. Science Updates are audio interviews with scientists and are accompanied by a set of questions as well as links to related Science NetLinks lessons and other related resources.
Standard(s): [S1] CHE (9-12) 4: Describe solubility in terms of energy changes associated with the solution process.