Answer the following questions:

1. How do stars release energy?

2. What two elements is our Sun mainly composed of and what proportions do we find them in?

3. What is formed when two protons fuse?

4. What substance is formed when a proton collides with a 2

1H nucleus?

Fusion Reactors

5. What technical difficulties exist with fusion reactors?

6. How is the plasma heated and contained in a fusion reactor?

7. What would happen if the plasma touched the reactor walls.

8. What would the advantages of constructing a successful fusion reactor be?

9. Copy and complete the following table

How does it work? How does the reactor work?

Advantages/ Disadvantages?

Fission The nucleus of a fissionable atom splits into two fragment nuclei and releases energy.

Fusion A plasma of bare nuclei is heated using a large electric current and is contained using a magnetic field.