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Density Column Lab - Part 2

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Concluding a two-part lab activity, students use triple balance beams and graduated cylinders to take measurements and calculate densities of several household liquids and compare them to the densities of irregularly shaped objects (as determined in Part 1). Then they create density columns with the three liquids and four solid items to test their calculations and predictions of the different densities. Once their density columns are complete, students determine the effect of adding detergent to the columns. After this activity, present the associated Density & Miscibility lesson for a discussion about why the column layers do not mix.

Material Type: Activity/Lab

Authors: Barry Williams, Jessica Ray, Phyllis Balcerzak

Voyager 25th Anniversary Poster

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This poster was developed to commemorate the 25th anniversary of the Voyager 1 and 2 launch. The learning objectives of the activity Voyager 1 and 2: Where Are You is to help students appreciate the great distances between the planets and their comparable sizes, view the solar system in three dimensions in a useful scale, and visualize the paths of the Voyager spacecraft and their distances and positions.

Material Type: Activity/Lab, Diagram/Illustration, Interactive, Lesson Plan, Student Guide, Teaching/Learning Strategy, Unit of Study

Author: Jet Propulsion Lab, CIT, Pasadena, CA

An Analytical Chemist, a Biochemist, an Animal Scientist, and an Oncologist Walk into a Lab…...No Joke

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In this project, much of the learning responsibility is placed on the individual students within the project team, and also on the team acting as a cooperative unit.  Students will be provided with some basic background and will have some avenues to investigate and present as a team (polar vs. nonpolar compounds and surface area, hydrophilicity vs. hydrophobicity, the history of mass spectroscopy, the advantages and disadvantages of longitudinal studies, the specialization of scientific fields, and the importance of collaboration between experts in different scientific fields.

Material Type: Lesson Plan

Author: Brian Cartiff

Analyzing Star Trails

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In this activity, students examine a photograph of the night sky and answer questions about their observations. The picture, taken by a high school student in upstate New York, offers insight into the Earth's rotation, apparent star motion, the location of Polaris (the North Star), circumpolar constellations, and pointer stars.

Material Type: Activity/Lab, Interactive

Author: Steve Kluge

Antioxidant Enzymes: Three or Four Veggies a Day Keeps Aging Away

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The purpose of this video lesson is to expand the student's knowledge about enzymes by introducing the antioxidant enzymes that are intimately involved in the prevention of cellular damage and eventual slowing of the aging process and prevention of several diseases. Students will learn that natural antioxidant enzymes are manufactured in the body and provide an important defense against free radicals. The topic of free radical action is introduced, covering how they are constantly generated in living cells both by ''accidents of chemistry'' and also by specific metabolic processes.

Material Type: Lecture

Author: Sawsan F. Karadsheh

Are You Kyoto Cool?

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Students will complete this survey that determines their personal and household contributions to atmospheric Carbon dioxide by using information about their previous year's consumption. They will understand that Carbon dioxide is a greenhouse gas produced by the combustion of fossil fuels, and that its production can be minimized by taking personal steps to conserve.

Material Type: Activity/Lab, Interactive

Author: Glenn Dolphin

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