In terms of thrills, i'd rank them (5 being the least, 1 being the most thrilling)-
5- Splash Mountain
4- Big Thunder Mountain
3- Space Mountain
2- Everest
1- Tower of Terror
ToT doesn't have as much of a prolonged thrill factor, but there's a very unpredictable part to it. Besides being very creepy from the build up (for a kid), the drop sequence is randomized. You could get dropped once, or more than 4 times (i think 4-5 was the most i ever got dropped, i dunno the max, may be more). It usually has a scare drop that jerks you a bit before the actual drop cycle starts. It jerks you up rather fast as well. Plus, it's mostly in the dark which doesn't help as well. AND the drops pull you down, they don't just drop you. They pull you down faster than the speed of gravity. It's a mixture of thrills, randomness, and a sort of psychological fear that makes me think this is the most thrilling ride there. Might not be too good for a five year old girl (depends on how well she handles both thrills and somewhat disturbing rides).
Just my opinion. Everest is fast, but its very smooth and not jerky at all. Worst parts include the ascent (pretty tall and you don't have any visible support, if she's scared of heights, be warned), the backwards part, and the final large drop from the cave. It's really not too bad though.
Space Mountain is just jerky. It's not too bad, but it jerks you around somewhat. Unless she gets really bad headaches from being jerked around too much, don't worry about it. Worst part is a somewhat abrupt drop near the end.
Only advice i can give you- don't assume your kids will react the same way you do to certain rides. If you like a thrilling one, it doesn't mean they will. And if you hate one, it doesn't mean they'll hate it. My mom hated Space Mountain and would rarely let me ride it when i was little. But i enjoy it a lot. Same goes for a lot of the thrill rides. Tower of Terror is my worst enemy. I love it and hate it. I have a great fear of heights and of being dropped.
Might want to ask your daughter how she feels about certain physical sensations. Like dropping, being jerked side to side, speed intensity, being pulled suddenly down, how she likes riding things that are fast in the dark, etc. That might give you a better idea of what sorts of rides she can handle or not.