Grade 5 Science Lesson 7 Effects of Human Activities on the Environment

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Grade 1 Science Lesson 3 The Animal Kingdom
Grade 4 Science Lesson 17 Personal Hygiene and Cleanliness
Grade 2 Science Lesson 18 Day and Night
Grade 3 Science Lesson 2 Animal Habitat And Food Habits
Grade 4 Science Lesson 8 Natural Disasters
Grade 2 Science Lesson 1 Living and Non-living Things