Acid Rain (Gems Guide) National Standards: A, C, D,E, F, H Grade Level: 4-8 Objectives: âÂ?¢ Students will cooperate in a group of four to complete all tasks âÂ?¢ Students will infer that soil can change the pH of a lake âÂ?¢ Students will infer that the level of acid in a lake can affect … Continue reading Acid Rain Lesson Plan