Kitchen Chemistry http://pbskids.org/zoom/games/kitchenchemistry/
Energy Quest Game http://www.channel4learning.net/sites/sos/energy.html
Fun with Elements http://funschool.kaboose.com/formula-fusion/games/game_element_lab.html
Energy Games http://www.gamequarium.com/energy.html
Matter Games http://www.gamequarium.com/matter.html
Electricity Games http://www.gamequarium.com/electricity.html
Forces and Motion Games http://www.gamequarium.com/forcesandmotion.html
Physical and Chemical Change Games http://www.gamequarium.com/change.html
Hurricane Tracking http://teacher.scholastic.com/activities/wwatch/hurricanes/experiments.htm
Different science games http://classroom.jc-schools.net/basic/science.html