The Earth gets its heat from the sun.
Physical properties of a substance are characteristics that can be observed without altering the identity of the substance. Color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.
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Fold mountains form when two continental crust plates collide
They are floating on the Earth's mantle, a really thick layer of hot flowing rock. The flow of the mantle causes the plates to move in different directions. When the edges of plates meet, four things can happen: Even though plates move very slowly, their motion, called plate tectonics, has a huge impact on the Earth.
