wh and chem sat subject tests

<p>i'm taking the chemistry and world history sat 2s in a week and am wondering 2 things --
1. ive taken the ap exams in both subjects. i took a practice test for each from the respective pr sat 2 books yesterday and got a 640 on both (before reading them). having studied the subjects extensively for the ap exam, do you think i can get my scores above 700 after reading the review books? or should i go back to my ap review books/textbook?
2. if im planning on majoring in a field completely unrelated to history or chemistry, it is imperative that i do well on these if i want to get into a top school? do i need to report the scores of all subject tests i take?</p>

<p>just wondering. thank you!</p>