Scientists study how radioactive isotopes in rocks, such as Carbon-14, decay to tell the age of rock.

Explain how knowing the half-life of Carbon-14 can tell scientists the absolute age of a rock sample.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.

To see a general view of a microscope slide, use low power. to see a more specific and detailed view, use high power.

This movement is also referred to as  glacial plucking