Q: The layer of nearly molten rock right under the Earth's crust is called its ______. A: Mantle
Q: What kind of rock is formed when existing rocks are changed by pressure or heat? A: Metamorphic
Q: When you dig down far enough so that you can't dig anymore. you have found (or hit) what? A: Bedrock
Q: Scientists estimate that the Earth is 4.5 ______ years old. A: Billion
Q: A spot on the Earth's surface from which steam periodically erupts is called a what? A: Geyser
Q: The innermost part of the Earth is called its ___. A: core
Q: The Earth has a central core made of two metals: name one. A: Nickel
Q: A bright sheen, usually blue or white, on the inside of a gemstone is called a what? A: Schiller
Q: Rock formed when small particles compress together is called what? A: Sedimentary
Q: What kind of cave structures stick up from the floor of a cave? A: Stalagmites
Q: The crater from the asteroid impact which started the demise of the dinosaurs is located in what country? A: Mexico
Q: The flat sides of a crystal are called what? A: Faces
Q: A smooth stone with banded layers is called what? A: Agate
Q: A rock formed when lava cools and solidifies is called what? A: Igneous
Q: Continents float on the Earth's mantle because continental rocks are ____ than sea floor rocks. A: Lighter
Q: The "precious metals" are gold, silver and what? A: Platinum
Q: True or false: The addition of a colored mineral oxide to a clear glass or glaze will always give you the same color as the oxide itself. A: False
Q: Rock formed directly from cooled lava is called what? A: Igneous
Q: Most lunar craters were caused by what kind of event? A: Impact
Q: Clays result from the weathering and decomposition of what type of minerals? A: Feldspar
Q: Rock formed from other rocks by the action of heat and/or pressure is called what? A: metamorphicÂ