How do scientists find the ages of rocks?(1 point)

Question

Responses

They measure the crystals that make up the rocks. The older the rock, the larger the crystals that make up the rock tend to be.
They measure the crystals that make up the rocks. The older the rock, the larger the crystals that make up the rock tend to be.

They measure the amount of the decay of certain unstable atoms in the rocks.
They measure the amount of the decay of certain unstable atoms in the rocks.

All rocks on Earth tend to be about the same age because rocks cannot be truly destroyed once created.
All rocks on Earth tend to be about the same age because rocks cannot be truly destroyed once created.

There isn't a completely accurate way to date rocks.

Answer 1

The correct response is:

They measure the amount of the decay of certain unstable atoms in the rocks.

This method is known as radiometric dating, where scientists use the known decay rates of isotopes to determine the age of a rock.