Here's what matters:
* 11th-grade performance: Your grades in 11th grade are crucial. Strong performance will show colleges that the 10th-grade slump was an anomaly. Consistent high grades in 11th grade (and ideally, 12th grade) will significantly mitigate the concerns about your 10th-grade grades.
* Explanation for 10th-grade dip: In your application essays and any supplemental materials, clearly and honestly address the reason for your lower grades in 10th-grade science and math. Was it a challenging teacher? Were you dealing with personal issues? Did you struggle with a particular learning style? Showing self-awareness and a plan to overcome the challenges is important.
* Rigor of your coursework: Colleges will consider the difficulty of your classes. Taking challenging courses, even if your grades aren't perfect, demonstrates ambition and academic preparedness.
* Extracurricular activities: A strong extracurricular record demonstrates well-roundedness and commitment outside academics.
In short: Yes, you absolutely still have a chance of getting into good colleges. Your SAT score is a powerful asset. Focus on excelling in your remaining high school years, providing a compelling explanation for your 10th-grade grades, and highlighting your strengths beyond academics. Work with your school counselor to build a strong application. A high SAT score opens doors to many colleges, but a comprehensive application is essential.