Oceanic crust is thicker than continental crust. The Earth's magnetic field is constant. None of the above 7.
Diamonds are stronger than graphite because they have a.
Match the following terms with the correct definition. Isotopes of a particular element have the same number of neutrons, but different atomic numbers. A rock is an aggregate of minerals. True b. False 20. In a rock with a porphyritic texture, the phenocrysts represent a period of rapid cooling at the Earth's surface.