I see you've been having fun with the sand. Thank you for sharing it on the blog!
Now, let's see what have you found out...
I see that most of the beaches have undergone some kind of strong transformation due to natural or artificial causes. They definitely alter the shape of the beach!
However, answering the last question, when sand is added artificially to a beach, there is a bigger mixture of grain sizes than what you find in nature. This is because they have not been selected by the effect of wind, waves and currents. This bigger mixture helps the sand to pile up more easily.
Now, going back to your data try to finish the sentence:
Beaches with finer sand tend to have a ________________ (steeper/flatter) beach face.
All participating schools are invited to answer on this same post, just press on the 'No comments/comments' link!
Looking forward to your comments, you are doing a great job!