What did Marie Curie call it when an atom ejects particles?

• Radioactivity
• Alpha Decay
• Beta Decay
• Half-life

What happens to the level of carbon-14 present in an organism after it dies?

• Carbon-14 increase
• Carbon-14 decrease
• Carbon-14 stays the same
• Carbon-14 increases then drops

What is the time it takes one-half of the nuclei of radioactive isotope to decay called?

• Half-life
• Carbon-14
• Isotope life
• Radioactivity

What happens when light shines on fluorescent materials?

• They explode
• The material breaks into particles
• The material glows
• The material gives off gas

A particle made up of 2 protons and 2 neutrons is called a(n)...

• Gamma Ray
• Alpha Particle
• Beta Particle
• Isotope

An electron or positron ejected from the nucleus of an atom is called __________________.

• Alpha particle
• Beta Particle
• Gamma Ray
• Isotope

High energy radioactive light that can penetrate lead is called...

• Alpha particles
• Beta Particles
• Gamma Rays
• Mass Number

Carbon-14 can be used to find the age of once living objects up to how many years old?

• 5,300 years old
• 1.5 million years old
• 50,000 years old
• 1,500 years old

What form of radiation has the greatest ability to go through (penetrate) materials?

• Alpha Particles
• Beta Particles
• Gamma Rays
• Isotope

Atoms of the same element that have different numbers of neutrons are _____________________.

• Mass Number
• Isotopes
• Nuclear Radiation
• Gamma Ray