NASA
Lava Layering
Take the old baking soda and vinegar volcano to the next level by using it to study repeated lava flows over time, examine geologic features on Earth and Mars, and speculate about some of the formations on Mars.
CK-12 Foundation
Ck 12: Earth Science: Explosive Eruptions
[Free Registration/Login may be required to access all resource tools.] Explosive eruptions cause widespread damage and are very dangerous.
PBS
Wnet: Thirteen: Volcanic Eruption
This animation shows the forces that help form stratovolcanoes.
Weather Wiz Kids
Weather Wiz Kids: Volcanos
Great resource for learning all about tornadoes. Find out how they are formed, how they erupt, the different types, and notable volcanic eruptions. Also includes safety tips, animations, and activities.