Explain how scientists know that the earth is 4.65 billion years old.

By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.

By dating the rocks in Earth's ever-changing crust

Explanation:

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.