Random Curves..?

<p>I've been taking ACT science practice tests and I feel like the curves are random. Tests that I feel are more difficult have hard curves (got a 29, 4 wrong) and tests I feel are easy have easy curves (got a 34, 3 wrong). I can't tell if I'm getting better, or if the curves really are random...</p>

<p>In the SAT I could always tell if it were a hard or easy curve just by the difficulty. For the ACT I have nooo idea. </p>

<p>Anyone else relate to this?</p>