1. Lightning that occurs within a cloud is known as _____ lightning.

2. Another name for a/an _____ thunderstorm is a “pulse” thunderstorm.

3. Tropical and _____ regions receive the most thunderstorms each year.

4. The three elements that are necessary for a thunderstorm to form are moisture, _____, and instability

5. An air mass that’s warmer than the surrounding air continues to rise is considered _____.

6. During a thunderstorm, a downdraft forms during the _____ stage.

7. _____ is a shockwave in the form of a sound wave that results from the rapid expansion of air following a flash of lightning.

8. During the _____ stage of a thunderstorm, the downdraft begins to weaken or eliminate the updraft.

9. Describe one of the three elements that’s needed for a thunderstorm to form.