Fission

Question 1

Nuclear fission

Answer 1

When a neutron bangs into a uranium 235 nucleus, it can cause it to split into 2 smaller nuclei and 2-3 neutrons. These neutrons bash into another uranium 235 nucleus and a chain reaction occurs.

Question 2

Moderators

Answer 2

Slow down neutrons

Question 3

Control rods

Answer 3

Absorb neutrons and can stop the chain reaction

Question 4

Advantages of nuclear energy

Answer 4

-no CO2
-large reserves of uranium

Question 5

Disadvantages of nuclear energy

Answer 5

-risk of nuclear accidents
-expensive