This book describes the properties of sound and the part it plays in communication, entertainment, navigation, health care, and industry covering such terms as decibels, sonar, ultrasound, amplitude, and more.
Charging a cell phone and going for a run both use energy. Plants create energy using sunlight. People eat food and break it down for energy. In short, energy is everywhere! Readers will learn the basic components of energy, including matter and atoms, as well as the many different kinds of energy that exist in the universe.
Presents information and question and answer sections on the physical sciences, discussing things like the states of matter, what the hardest natural substance is, how magnetism and electricity work, and how sound carries.
Antoine Lavoisier is considered to be the father of modern chemistry. Using experiments and careful measurements, he created a system to help chemists understand how matter behaves. He discovered and named oxygen and hydrogen, and helped set up a system to classify these and other elements. Perhaps his most famous discovery is the role oxygen plays in combustion.
