This perfect squares and square roots activity is a math challenge that is designed to help students practice their perfect squares and square roots. In this activity, students will use their knowledge of perfect squares of numbers 3-15 and square roots of perfect squares 9-225 to STOP THE ALIENS. Aliens have attacked the Earth and they want to destroy the human race.You must stop this invasion before the Earth is destroyed. You’ve received secret information on how to stop the aliens. You need