This timely book looks at the world's production of oil and our dependence on this natural resource. The majority of today's forms of transportation run on fuel that comes from oil, and hundreds of thousands of the items we use every day come from oil or oil-based products. Readers will find out about the origins of oil and its first use in industry, and learn how it is found, mined, and processed into many different products that are used all over the world. Real-world examples also consider the environmental and human disasters related to oil, encouraging discussion of the ethics and worldwide impact of the production, distribution, and consumption of this global resource. Possible alternatives to using oil are also discussed now that this important, non-renewable natural resource is running out.
What happens when you flip a light switch or press the power button on the TV? Electricity flows to the device and it turns on. Most of us use electrical gadgets all day, every day, without thinking about it. This book follows the journey from source to resource of solar power, one of the most exciting forms of renewable energy today. Readers will learn how electricity is made and collected directly from the sun and how it reaches us to power our modern world. Other sources of energy are also examined, as well as how grids work to move electricity across land and sea, and how it is fed into our homes. Real-world examples look at solar farms, solar furnaces, solar towers, and even solar transportation. With the world's nonrenewable resources such as oil running out, the advantages and disadvantages of solar power as a renewable alternative are discussed.
Imagine your family had to choose between sending you to school or having enough food to eat. This book tells how William Kamkwamba was forced to drop out of his school in Wimbe, Malawi, when a famine struck his village and his family, who relied on farming, could no longer afford his tuition fee. Instead of giving up on his education, William visited his local library often. It was here that he read a book about wind power. At the age of 14, William used what he learned from the book to build a windmill that brought power to his family’s home. He has since built his village’s first drinking water pump. William’s ingenuity, perseverance, and initiative are an inspiration to many people around the world.
This exciting book explains how the shape of Earth can change with the sudden movement of Earth's crust or when molten rock explodes out of an opening in Earth's surface. Young readers will be fascinated to discover how volcanoes form - destroying the landscape and creating new landforms at the same time. They will also learn about tectonic plates and fault lines, the damage earthquakes can cause, and how to stay safe when an earthquake happens.
This fascinating book explains how the shape of Earth is changed by weathering and erosion - the breaking down of rocks and minerals which are then carried from one place to another by water, ice, wind, and gravity. It is this movement that carves out valleys, causes trees to topple over, and creates or destroys good farmland. Examples of changes to landforms help show young readers the effects of weathering and erosion, which can happen quickly or sometimes take centuries!
Earth's surface is constantly being changed by heat, water, ice, salt, plants, and animals. Sometimes the changes are destructive to human activities such as farming and the building of structures. This interesting title shows the different ways people try to stop or reduce this change in the land. Examples feature such structures as dikes to hold back water and windbreaks, and adding shrubs, grass, and trees to an area of land to prevent erosion. Teacher’s guide available.
This informative book explains how Earth is covered by landforms and bodies of water, all of which change shape over time. Interesting images feature landforms such as mountains, valleys, and sand dunes, as well as waterways such as oceans, rivers, and ponds. Children will learn how they develop and why they change.
This engaging and accessible book explains how scientists use models to help them understand systems in the natural world. Readers learn about different kinds of models and discover the similarities and differences between models and the real objects and processes they represent. Readers are given several opportunities to create their own models.
Science uses evidence in explaining the natural world. Using relatable, real-world examples, this informative book shows readers how to construct an argument with evidence to support a claim. Readers will act and think like scientists as they learn how to distinguish between fact and opinion, and use evidence and reasoning to evaluate the claims of others.
Scientists use different kinds of investigations depending on the questions they are trying to answer. Accessible text and child-centered examples guide readers as they learn to plan simple investigations based on fair tests to answer their own science questions.
This informative book goes to great lengths to explain how scientists around the world use the metric system and related tools to help them compare, contrast, and analyze the measurement data they collect. Opportunities for hands-on learning make the content meaningful to readers as they refine their measuring skills.
This fascinating book explains that some animals must learn the basics of staying alive from their mothers, while others know how to survive without being taught. Students will discover how some bird and mammal mothers teach their babies how to find food and keep safe from predators. Readers will also learn about other animal skills such as finding their way over great distances. People need help from navigation instruments, radar, or maps. Animals use cues such as the sun, stars, or Earth’s magnetic field when they are swimming or flying. This book asks students to look at the skills of animals and compare them to their knowledge and ways of learning.
Read about the things that change outdoors with the season, including the hours of sunlight and the temperature.
Many technologies are made up of different parts that each perform a certain job. This basic introduction to systems will show you how all the parts work together as a group to complete a task.
Read about the different tools of technology we use throughout our day. Think about which kinds of technology you use yourself.
Enjoy reading about the changes in a rabbit as it grows from a newborn bunny to a full-grown adult.
Discover how a tiny seed grows to become a pumpkin with the help of water, sunlight, air, and soil.
Technology is the name we give to the tools that help make work easier, safer, or more fun for us to do. Learn about the basics of technology and how it improves our lives.
Read about the invention of certain tools, and how they have been improved over time to become the technology we use today.
Read about the Sun and the Moon, and how they change positions in the sky throughout the day. Find out what else can be seen in the sky.
Read about the kinds of jobs that people do as engineers, and how they use math, science, and creative thinking to solve problems.
Engineers don’t give up when they fail to solve a problem. Discover why learning from mistakes helps guide engineers to find the best solution.
Different problems need different solutions, but engineers follow the same steps to solve them. Discover the path engineers take to find new solutions or improve old ones.
Read about some of the things that engineers design, such as bridges and water systems, to improve life in our communities.
Read all about primary colors, and how they mix together to make secondary colors.