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Evidence of forests being flattened across the Americas

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The sulfate aerosols forced into the air caused global cooling, then global warming for many years.

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Newton’s first law helps us understand that an unbalanced force caused the asteroid to move toward Earth.

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Asteroids stay within the Asteroid Belt because their forces are balanced.

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The velocity at which the asteroid hit the planet was the most significant variable.

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Shocked quartz nearby was evidence of extreme pressures near the impact site.

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Earth’s gravity caused the asteroid to accelerate at 9.8 m/s/s.

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The impact force was great enough to send 90 million metric tons of debris and gasses into the air, and how it stayed in the atmosphere for so long.

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The lack of plutonium assured chemists that it was not a supernova.

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After the K-T boundary, scientists found fossils of smaller animals that lived in holes.

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Evidence of tsunamis found on multiple continents

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Potential energy is the product of mass multiplied by the gravitational force times the height (PE = m*g*h)

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Crater of the right size and age found in Mexico

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Potential energy converts to kinetic energy once an object starts falling.

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Newton’s third law helps us understand how the impact force was so great, that it caused massive earthquakes, tsunamis, shockwaves, and ejecta thrown in all directions.

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Iridium was found at levels 30 times higher than what is normal on Earth at the K/T boundary.

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Kinetic energy is the energy of a moving object and is a product of half the mass times the velocity squared (KE = ½m*v²). This is related to Newton’s second law.

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Great variety of life (including foraminifera) found in fossil record below the K/T boundary

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No dinosaur bones were found above the K/T boundary