Undifferentiated differentiated concentrated or micromarketing which is museums

How are rocks that cooled within magma chambers found on earth’s surface today? they are pushed up by magma under earth’s surface. they are revealed by erosion of earth’s surface over time. they are pushed to earth’s surface because of their larger size. they are revealed at earth’s surface due to their low density.

Which type of stimulus do mechanoreceptors detect? sound pain heat light

What is any method of measuring the age of an object or event in years, such as using atomic half-life?