Radioactive Decay Earth Science

The time it takes for half of a radioactive element’s atoms to decay is its

• era

• half-life

• relative age

• absolute age

Tags

NGSS.HS-PS1-8

There are 100 Carbon-14 atoms found. After one half-life, how many atoms will be left?

• 5

• 25

• 50

• 75

Tags

NGSS.HS-PS1-8

The process by which an unstable element naturally changes into another element that is stable is

• isotopes

• radioactive decay

• half-lives

• fossilizing

Tags

NGSS.HS-PS1-8

To determine Earth’s age, scientists used radioactive dating on rocks from

• Volcanoes

• Atlantic Ocean

• Grand Canyon

• The Moon and Meteorites

Tags

NGSS.HS-ESS1-6

Fossils can be dated by

• comparing their positions in rock layers.

• using isopropyl.

• knowing the age of the rock layer they are in.

• measuring radioactive elements.

• asking them out to dinner.

Tags

NGSS.HS-ESS1-5

What is an isotope's half-life?

• the time required for half of the parent isotopes to decay into son isotopes.

• the process by which an unstable element changes into a stable element.

• the time required for half of the parent isotopes to decay into daughter isotopes.

Tags

NGSS.HS-PS1-8

When unstable materials break down into stable materials.

• radioactive decay

• gravitational potential energy

• kinetic energy

• solar nebula

Tags

NGSS.HS-PS1-8

The process which an unstable element naturally changes in another element that is stable is called...

• half life

• radioactive decay

• isotopical aging

• science

Tags

NGSS.HS-PS1-8

The time required for half of the parents isotopes to decay into daughter isotopes is called...

• quarter life

• half life

• radioactive decay

• isotopical decay

Tags

NGSS.HS-PS1-8

What is the primary process by which unstable atomic nuclei lose energy by emitting radiation?

• Nuclear fusion

• Radioactive decay

• Chemical reaction

• Photosynthesis

Tags

NGSS.HS-PS1-8