Please help!!! College decision!

<p>I have been slacking off a bit in freshman and sophomore year, but junior year I worked VERY HARD. Due to my behavior in the past, my GPA was killed.
But I’m wondering about a couple of things;
• Would colleges look at my unweighted GPA or weighted GPA more?
• Do colleges specifically look at my Junior year grades? (Because it’s the only year I got straight A's)
• How much does my SAT matter?
• Are my clubs and awards really helping or do colleges not really care about them?
• How important is my college essay? Compared to GPA and SAT
• I will apply to Cornell, CAL Tech, Carnegie Mellon, UPenn, and some state safety schools. Which ones can I make it into? I would love to go to Cornell or Cal tech.</p>

<h2>Junior Year Courses:</h2>

<p>AP Physics
AP Chemistry
AP Calculus AB
AP US History
AP Lang
Spanish Honors</p>

<h2>Numeric Distinctions:</h2>

<p>3.75 (max 4) -- unweighted GPA
4.41 (max 5) -- Weighted GPA
2320 -- SAT score
800 - SAT Math IIC score
790- SAT Chemistry Score
790 - SAT Physics Score</p>

<h2>Clubs and Awards:</h2>

<p>District Science Fair winner for Physics Project
Science Olympiad Medal Winner
Secretary of Protein Research Club
National Honors Society
Vice President of Academic Decathlon Club
School Physics Team (4 people from entire school are selected)
State Science League Medal Winner for Physics
Volunteer 100+ hours</p>