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What state of matter is lava?

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Exploring how states of matter can change. Experimenting with a chemical change. VOCABULARY: chemical change; gas; liquid; matter; solid; MATERIALS: baking soda; vinegar; red food color; clay; Students create a chemical change using vinegar and baking soda. Lava is a liquid, that cools into rock, which is a solid. read more

The viscosity of lava is important because it determines how the lava will behave. Lavas with high viscosity are rhyolite, dacite, andesite and trachyte, with cooled basaltic lava also quite viscous; those with low viscosities are freshly erupted basalt, carbonatite and occasionally andesite. read more

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