Human ancestry http://www.becominghuman.org/node/human-lineage-through-time
National Geographic for Kids http://www.nationalgeographic.com/kids/
Google http://www.google.com
USGS volcano type site http://vulcan.wr.usgs.gov/Glossary/VolcanoTypes/volcano_types_quick_reference.html
National Museum of Nuclear Science http://www.nuclearmuseum.org/
Interactive Periodic Table http://www.dayah.com/periodic/
Blank periodic table work sheet http://www.mccsc.edu/~jbrand/elements/BlankPeriodicTable.gif
Take a tour through Geologic Time. Geologic Time Line
Volcano World reference site for research on Volcanoes http://volcano.oregonstate.edu/
Race and Ethnicity http://www.understandingrace.org/home.html
C. Bailey on Twitter Twitter
Different types of Lava Flows Volcano research/Lava types