In some places in the world, often near plate boundaries, there is magma (hot molten rock) very near to the Earth’s surface. This causes other volcanic features such as geysers and hot springs, called geothermal features. The word comes from geo, meaning the Earth, and thermal, meaning heat.
Water from the Earth’s surface trickles down through holes and cracks in the land. Geothermal features are almost always caused by magma that affects underground water.
The most spectacular geothermal feature is the geyser. This is a fountain of steam and water that erupts from holes in the ground. Vents (holes) called fumaroles, where steam escape gently, are more common. Geysers and fumaroles may also give out carbon dioxide and sulfurous fumes.
Nonhardening modeling material, 3 bendable straws, pitcher, food coloring, large plastic bottle, large jar.
MUDBATHSYOU WILL NEED
Cornstarch, cocoa powder, mixing bowl, wooden spoon, measuring cup, milk, pen, oven mitt.
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