The document discusses climate and ecosystems, focusing on tropical rainforests, deserts, and savannas. It poses three questions: 1) Why is it hot and wet on the equator? 2) Why is there low rainfall along the tropics creating deserts, and why does temperature vary daily and seasonally? 3) Why is there a wet and dry season in the savanna? Students are then instructed to discuss the questions in groups and prepare a PowerPoint presenting their researched answers.