Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now.   Click the Techie Toolbox for tips and help to make the most of your time on the Web.   Unit 2: Composition of Earth   Chapter 3: Matter and Atomic Structure   P. 52 Matter and Atomic Structure Alchemy This site explains alchemy and the origins of modern chemistry. What three techniques of modern chemistry did alchemists develop? Cool Hot Rod In this experiment, you can find out what happens to copper tubing when it is heated and cooled. After doing the experiment, you can share your results with other students online. The States of Matter Explore this site that supports an online geology course given by the Charter School of Education at California State University, Los Angeles, California. Find out how atoms in plasmas lose their electrons. What happens to those electrons? p. 69 Plasma What are plasmas? This site represents all aspects of plasma science and technology. Find out who originally identified the fourth state of matter, and who named it. Click on Space to see images of plasmas in space. Plasma, Plasma, Everywhere At this NASA Web site you can learn how Earth is surrounded by a plasmasphere. Click on the plasmasphere image to see a simulation of the magnetosphere’s changing shape. How much of the universe is made up of plasma? p. 72 SEM images Electron Microscopy Visit this site for an introduction to electron microscopes and how they work. Click on scanning electron microscope to find SEM images of organically deposited iron oxide (rust), a fracture in a paper clip, and a brittle fracture of steel. How does the topography of a SEM specimen differ from its morphology? Scanning Electron Microscope At this Boston Museum of Science Web site, click on Image Gallery to see a wide variety of SEM images, including insects, diatoms, and plants, and a dentist’s drill, toilet paper, salt, and a mascara brush. Click on How the SEM Works to watch a slide show about the SEM. Biological specimens must be made to conduct electricity to be seen under the SEM. How are these specimens treated to enable them to conduct electricity? Bugscope Bugscope is an educational project of the University of Illinois. Its goal is to demonstrate that schools can gain access to a scanning electron microscope for student use. Click on Gallery, and then on pseudo-color gallery, to see SEM images of insects in false color. Why are original SEM images always in black and white?