The ACT is required or preferred by more colleges and universities than any other college entrance exam. This essential guide will help you sharpen your skills and study more effectively for the exam. The questions are similar to the ones featured on the ACT, so you will know what to expect on test day. Each question includes a concise, easy-to-follow explanation. Whether you have been studying all year or are doing a last-minute review, , Second Edition will help you achieve a higher score on the exam. This edition has been updated to match the current exam. features: •500 ACT science questions •Full explanations for each question •A format parallel to the ACT exam