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Obsidian is basically “unpopped” pumice: obsidian and pumice are igneous rocks that are made out of the same material, but because of the way it’s formed inside the volcano, pumice looks very differen ...
What floats in water? Wood, bread, apples...and very small rocks?Are there any rocks that can float?Test different types of rocks to see if they can float in water.It is an educational content by educ ...