Hi Melissa, welcome aboard!
I'm no expert in what Cal Arts would be exactly looking for but I'm liking the 4th and 5th images here.
The 4th has real loosey goosey gestural lines which work well in animation! The 5th has a lot of emotion and feeling in it.
The backgrounds would be good if you filled up the whole page I think. The 3rd page of sketches are a bit too stiff. Try to get expressions/emotions into your work. For instance, a sketch with an old couple (granparents) interacting with their baby/toddler...does that make sense?
Here's a link to a girl who went to Cal Arts. Take a look through her drawings and I think it may give you an idea of what they like....uh, I think! Hopefully someone can give a better idea for you!
You are a level 8 ninja and even though you have a lot of weapons sometimes your ninja moves are your most powerful.