This week you will be doing a different kind of description. Nature pretty much (we hope) stays still. You look at and say what you see. That was week 1.
But what happens to the writing when you describe a series of actions or observed events. How do you order the material, how do you connect the bits and pieces, how do you keep it fresh, how do you avoid writing "...and then this happened and then that happened so what I did next was blah blah but suddenly such and so popped up which forced me to go with my backup plan. First, I did blah, and then I tried blah blah...."
See? It's just one damn thing after another. It makes sense in its own terms but only the time sequence is holding it together and making it coherent, and time sequencing is a default way of creating coherence but it's not a very deep way.
There are other, better ways that use chronological order, certainly, but whose larger coherence is in ideas, a point, playfulness, rhetorical snap, etc.