SOLVED. Children's fiction - Girl gains superpowers; can transform into a liquid among other things. [s]

[Zara]

So, I read this one when I was in 4th grade. I don't remember much, but one of her powers was turning into a liquid form. I think her liquid form might've been silvery (think like mercury), and maybe she could only stay in it for a limited time? Also, maybe one of her other powers was super strength?
There's a small chance that there might have been two books with similar protagonists, in which case one would likely be a ripoff of the other.

[Becca]

The Secret World of Alex Mack series, based on the TV show? Alex, You're Glowing by Diana G. Gallagher is the first book.

[Zara]

That's it! (How do you move something to the "solved" category?)

[Zara]

Never mind, figured out how to do it myself.