Tough is a word often used to describe the class 10 science exam. There is some truth to it as science is a subject not easily mastered. Even people considered to be geniuses at this didn't become so overnight. It takes constant learning, loads of practice and devotion to be able to become good at this subject. However to do so, one needs to practice a lot of different questions and the availabilty of the former online is questionable at most as the content found either lacks quality or the answers available are not upto the mark. This is not so with the case of Extramarks as it provides a great deal of CBSE class 10 science sample papers thereby helping the students to achieve success in the exam.