Scientists predict what will happen in the future based on what they know now. Patterns in the natural world, such as day and night and the seasons, help them make predictions. Learn how to act like a scientist and make your own predictions. The Science Sleuths series encourages you to think and act like a scientist. Each book explores an important skill in scientific exploration. Questions and activities help you look at the world around you in a curious way-the scientific way! Book jacket.