WOD Quiz TODAY

SPS3a. Differentiate between alpha and beta particles and gamma radiation.

EQ: What is the difference between alpha and beta particles and gamma

radiation?

Activator • In 1974, Donald Johnson and Tom Gray discovered the skeleton of the world’s oldest human relative. Nicknamed Lucy, the remains were dated using the potassium-argon radioactive decay method. Lucy was determined to be 3.2 million years old.

• Radioactive nuclei are said to DECAY.

• From the general meaning of decay, what do you think this means?

Jig-Saw • Find your group• Use the following pages:– Blue Book: pages 541 to 544

• Create a CIRCLE - MAP• Every one must make one for your symbol.– Alpha– Beta– Gamma

Back at your original seat:• Make a tree map• Find three bubble maps in your row to

completeTypes of Radiation

ALPHABETA

GAMMA

Radioactive atoms – unstable nucleus due to too many neutrons

• Emit particles and energy to become stable – nuclear decay

3 types of radiation• Alpha radiation• Beta radiation• Gamma radiation

Alpha Radiation• Releases 2 protons, 2 neutrons

• (Helium or He atom)• Very large particles

• Can’t travel thru materials• Not dangerous to health

Beta Radiation• Releases electrons

• Very small fast particles• Can travel thru paper but not anything else

• Not dangerous to health

Gamma Radiation• Releases energy

• Can go thru most materials• Very dangerous to health

Neutron Radiation• Releases neutrons• Can go thru materials

• Very dangerous to health

TOD! • Take your tree map • Take the tree map we just took notes with • Compare and contrast them using your

original type of radiation

My Gamma

NotesGamma