Readers learn how this simple machine makes it easier to lift and lower objects. They learn about fixed and movable pulleys and when it is best to use each. By the end of the book, readers know the difference between complex and simple machines and how pulleys are used in everyday life to make work easier.
Leo is a genius. His pet cat named Pallas is not! But together they come up with some brilliant inventions based on maths shapes. And all this - more than 30,000 years ago! Circles covers the essentials of this geometrical shape, its functions and applications.
This book explains how models help us test new designs and to understand living things. The book includes various types of models, such as scale, graphical, conceptual, and computer models, which are used to analyze how we understand different things.
Sometimes you just need to slow down in order to understand what is going on. This book will take things slowly so that you wont miss any important information. Get ready to travel through time using visual representations, rhyming text, and guided instruction, allowing students to understand the working of time! This book will allow students to solve problems involving measurement and estimation of intervals of time.
It is essential that scientists design a plan to ensure their experiments are conducted accurately and safely. Readers will learn how to gather materials, and create a step-by-step procedure to test their hypothesis. Readers will become familiar with controls and variables in a scientific setting.
Science engages a curious mind. Questions can come from practically anywhere. Readers will learn why scientists ask questions and how to develop meaningful questions to help guide their scientific experiments.
Science never stops-even when the experiment is complete. Now is the time to make sense of your data. This title teaches young scientists how to analyze, interpret, and communicate the results of their data.
Sharpen your pencils and put on your goggles! It's time to see science in action! This book helps readers hone their observation and recording skills during an experiment. Students will learn how to effectively collect and record data in a journal, as well as organizing data using graphs, charts, and diagrams.
Sometimes a hunch isn't enough. Learn how scientists make educated guesses called hypotheses to test their theories. A hypothesis is the foundation of the scientific method. Readers will learn how to construct a measurable and focused hypothesis to test in an experiment.
Take an in depth look at mathematics in this science encyclopedia.
