Why do police cars patrol the streets? Police cars help police officers fight crime and stop people from driving dangerously. Get a look into these cars and the equipment police use inside them.

"Simple text and full color photographs introduce young readers to monster trucks. Intended for students in kindergarten through third grade"--Provided by publisher. A monster truck rolls over a car and crunches it under its huge wheels. Monster trucks are giant pickup trucks that can race around a track. Kids will roar with excitement as monster trucks dominate this book's pages.

Gravity keeps people grounded and prevents them from floating away into space! Young readers will learn how and why gravity works and discover how to measure it on Earth.

Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials. Elevators use pulleys to move up and down. Kids will learn how pulleys make work easier and how they are often part of complex machines.

As soon as food touches your tongue, it begins a long process of moving through different parts of your body. This book explains how the human body breaks down food to get nutrients and stay healthy.

Wave down a taxi and catch a ride! These helpful cars take people where they need to go. Beginning readers will learn how to catch a taxi, how taxis work, and where taxis can take people.

Gases, liquids, and solids are all matter. Everything that has mass and takes up space is matter. This book instructs eager learners about the different forms of matter and explains how matter can change forms.

Skid steer loaders are small construction machines that can do many different jobs. They are very useful for working in small places. Follow a skid steer loader as it drills a hole, lifts up a tree, or moves dirt.

Winter winds blow snow at 35 miles per hour or more for at least three hours during a blizzard! Young readers will learn how blizzards form and why blizzard conditions temporarily shut down communities.

How do we breathe and why do we need oxygen? Your lungs work hard to keep oxygen flowing through your blood. This book explains how the respiratory system functions to take in the air we need to live.