Tropical depression

 I learned that once a group of thunderstorms has come together under the right atmospheric conditions for a long enough time, they may organize into a tropical depression. Winds near the center are constantly between 20 and 34 knots (23 - 39 mph) 

  

What I did in our class: we define the tropical depression.

I can apply my learning about tropical depression in our lesson in next grade. I can also apply this in my daily life if there is a tropical depression I know already the winds in the center.

I need to learn more about the other classification of tropical cyclones.