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What do a rusting bike, a growling stomach, and a crackling campfire have in common? They are all the result of chemical reactions! Chemicals are constantly reacting in our bodies and all around us. Chemical reactions can be natural, like respiration and photosynthesis, or human-made, like the reactions in fertilizer and fireworks. This book simplifies chemical reactions with clear explanations and explosive examples.
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This physical science volume addresses mixtures and solutions and the technology involved with creating and studying them. Readers will learn about the methods that chemistry pioneers used to arrive at an understanding of the nature of mixtures. Readers will learn how to distinguish mixtures from solutions. Historical examples and contemporary examples from the fields of pharmacology and microelectronics will promote interest and understanding. Diagrams...
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What are atoms? We can't even see them, so how do we know they are real? This book introduces readers to the concept that atoms are everywhere and that everything is made up of them. Readers will learn the history of atomic theory, from early Greek philosophers through John Dalton and Niels Bohr and on to current researchers in the field. Students will encounter high-tech tools such as the atomic force microscope and discover how scientists and engineers...
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What happens when you enter a room and flip the light switch? Why does a cell phone battery run down? This book focuses on electricity, electric currents, and electrical technology. Readers will learn where electric currents come from. They'll discover some of the early pioneers in the field of electricity, including André-Marie Ampère and Alessandro Volta. Students will learn how inventors such as Thomas Edison and Nikola Tesla helped bring electricity...
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Everything we can see and touch is matter, even things we can't see and touch is matter. We can tell the difference between the different kinds of matter through each one's properties, such as density, magnetism, and conductivity. Knowing about these properties and matching the right materials with the right jobs is essential for today's scientists, engineers, and inventors. Informative photographs and stimulating sidebars enhance the accessible narrative,...
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"The ringing sound of an electric guitar, the ripples after you've thrown a rock in the water, even way a microwave oven cooks your food-these are all examples of what waves can do! A wave is one way that energy travels through space and matter. This book breaks down complex physical science topics so young readers can understand them more easily. Real-life examples of how people use waves for science, art, and more help readers see how waves are...
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"Sound is more than just the things we hear. It's made up of sound waves, vibrations that travel through air, water, and even solid objects. In this book, readers will learn how sounds are created and about the kinds of sound waves, the properties of sound, and the scientific laws of sound. They'll also discover more how about we produce music and speech and how we hear. Primary sources and full-color photographs aid readers in understanding this...
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"A rainbow is just one example of light in action! Light is a fundamental component of life on Earth, but how does it work? Light is unique in physical science because it doesn't completely conform to either a wave model nor a particle model. In this text, readers will discover that light is a form of energy. Readers will also learn aspects of light such as reflection and refraction. This challenging physical science concept is made easier to understand...
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"What makes it possible for plants to grow? What makes it possible for you to move your arm to raise your hand in class? What makes it possible for your house's lights to turn on? The answer is energy! Energy is the capacity for doing work. This book focuses on the different types of energy, including potential, kinetic, thermal, electrical, chemical, and nuclear. Readers will learn about properties of energy, how energy is measured, and major sources...
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"Why do objects fall toward the ground? What makes electric lights go on when we flip a switch? How do magnets work? The answers to these questions and many more become clear when you understand how electromagnetic force and gravitational force operate. This title looks at these forces and presents key concepts in an accessible way. Important theories and applications are presented in clear, age-appropriate language. Full-color photographs and primary...
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"Heat is a form of energy that people are very familiar with. Heat makes our homes warm in winter. It helps us prepare food for dinner. Heat can also be dangerous, such as when a fire destroys a home or forest. In this book, readers will learn the physics behind the transfer of heat from one object to another-whether it's the sun warming our world or a stove burner heating water. Readers also explore how a change in temperature can change the characteristics...
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"Everything in the universe is on the move! Motion plays a big part in our world, even when we cannot see or feel it. In this book, young readers will discover the laws of motion and learn how they affect everything we do. From the action of sports to the thrill of amusement park rides and from the movement of the planets to the motion of the waves, students will learn why things speed up, slow down, change direction, and stop-at least until they...
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