Clouds are made of hundreds of billions of tiny little droplets of liquid water that have condensed onto particles of some sort of dust. Now let’s turn the heat down a bit more and see what happens. As the temperature drops and the molecules continue to slow, the bonds between the molecules can pull them together tighter and tighter.


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2 Responses to “What are clouds?”

  1. Rosalind Hitchcock says:

    Videos are there now. Thanks!

  2. Rosalind Hitchcock says:

    There doesn’t appear to be a video for this lesson – is that deliberate? (for all other lessons, we see an associated lecture or lab video). Thanks!