1. define the following words from ch. 19 ch. 20
Chapters 19 & 20
define the following words from
ch ch. 20

2. Answer the following questions. Answers can be found in the movie
How is the sun a nuclear reactor?
Explain a fusion reaction as it occurs in a star.
What is nuclear fission?
Why do fusion and fission produce energy?
How is radiation dangerous?
What did Pierre and Maria Curie discover?
When and where was the first atomic bomb used in war?
Why is a hydrogen bomb more devastation than an atomic bomb?
What are the advantages of nuclear powered submarines

3. Fusion & Fission Stars & the sun are nuclear reactors
Intense heat and pressure cause hydrogen atoms to collide and fuse (fusion) to form helium
The NRG from this fusion fuels the star
People have been able to create nuclear energy through fission (nuclei split apart) which releases great amounts of energy
Fusion and Fission are difficult to control and devastation can occur with uncontrolled reactions

4. Examples of Nuclear Reactions
Marie Curie pioneered the study of radiation, but died from leukemia caused by its toxic properties
Mushroom Cloud from atomic bomb
Nuclear submarines are superior to diesel subs

5. Radioactivity aka radioactive decay
process by which certain elements emit particular forms of radiation
Major Forms of Radiation:
Alpha
Beta
gamma

6. Alpha Particle Characteristics:
Fast flying + charged subatomic particles that each have 2 protons and 2 neutrons for a net +2 charge (comes from the protons)
Is ejected by certain radioactive elements

7. Beta particles…
High speed electrons ejected from an atom

8. Gamma Rays … are a form of electromagnetic radiation with no charge
are high energy radiation
are dangerous to humans
have the greatest penetrating power especially to cells in the body of the three rays