New Clear Physics

_________ happens naturally due to an unstable nucleus.

• fission
• fusion
• radioactive decay
• K-capture

Tags

NGSS.HS-PS1-8

What is a chain reaction?

• When electrons are emitted causing electricity
• When a nuclear fission reaction occurs, the protons emitted can strike other nuclei in the sample, and cause them to split
• When a nuclear fission reaction occurs, the neutrons emitted can strike other nuclei in the sample, and cause them to split
• When a nuclear fission reaction occurs, the electrons emitted can strike other nuclei in the sample, and cause them to split

Where does fusion occur naturally?

• Underwater
• All around us
• In the radioactive waste
• On the sun

Tags

NGSS.HS-ESS1-1

What do  control rods do in a nuclear reactor?

• Regulate the rate of reaction  by absorbing and slowing neutrons
• Produce electricity
• Produce neutrons to increase the rate of reaction
• Reduce heat produced by the uranium rods

Tags

NGSS.HS-PS1-8

Isotopes of the same element have different ____________. 

•  numbers of protons  
• numbers of electrons
•  symbols 
• numbers of neutrons

How is the chain reaction slowed in a nuclear reactor?

• By removing the fuel rods

• By inserting the control rods

• By cooling the reactor down

• By changing the moderator

Why is the reactor filled with graphite?

• To speed up the neutrons

• To slow down the neutrons

• To stop the neutrons

• to make radioactive pencils

What is nuclear fusion?

• The splitting of an atom

• The joining of two light nuclei

• The splitting of a heavy nucleus

• The joining of two or more fuses

Why does fusion only happen at very high temperatures?

• Because it happens in stars

• To overcome the repulsion of the positives

• To increase the speed of the reaction

Which of the following is true about nuclear fission?

• The mass of the product is greater than the mass of the original nucleus
• The mass of the product is less than that of the original nucleus
• The mass of the product is the same as the mass of the original nucleus
• The mass of the product is 100 times greater than the original nucleus

Tags

NGSS.HS-PS1-8