Learn how energy affects the movement of objects through the air, the warmth we feel on our skin when the sun shines, and many concepts in between. A True Book: Physical Science allows readers to find answers to puzzling questions as well as discover how people have used physical science to make countless innovations throughout history. This series includes an age appropriate (grades 3-5) introduction to curriculum-relevant subjects and a robust resource section that encourages independent study. Readers will also conduct energy experiments and find out how humans have learned to harness energy in different ways.