Ключевые слова: advance, air, apple, art, biology, bionomics, blackboard, book, boy, brainy, breath, capable, carbon dioxide, chalkboard, chemistry, child, childhood, class, classroom, clever, cognition, ecology, ecosystem, education, energy, environment, experience, fruit, fun, funny, glucose, green, intellect, kids, learning, life, light, man, nature, oxygen, photosynthesis, physics, purpose, reaction, relationship, school, science, student, study, summer, sun, sunlight, teaching, transformation, tree, water,