While the planet was partially melted, particles moved due to gravity. At first the mixture of rock and metal inside Earth was mostly uniform. Earth's molten state then allowed materials within the planet to move and flow. The force of gravity pulled high-density materials toward the center, and materials with low densities were pushed toward the surface. What is this process called?​

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changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .

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