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Let's talk about speed. This science book will define speed. A definition will lay down the foundation for further learning; and in this case, it's to distinguish speed …
This book will focus on the three types of energy - heat, light and sound. At the end of this book, you should demonstrate competence in identifying types and sources of energy. …
Did you know that big, complex machines can be broken down into six simple machines? This book will introduce your second grader to the six simple machines that make work easy. The …
Motion and force have a very intricate relationship that's why they are often studied together. In this book, you will learn about the effects of motion and force on position and …