If there is two fossils in the same layer does that mean they are the same age (Really need this fast)

No it doesn't

Explanation: Because the Earth's surface has changed so much after so many years.The Earth's surface has changed dramatically over the past 4.6 billion years. Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free. These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing. As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.

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heat released by collision processes during accretion, and heat from decay of radioactive elements

explanation: