Explains the processes by which a hamburger and other foods are used to make energy, strong bones, and solid muscles as they pass through the digestive system.

A description of sights and experiences on the surface of the moon, based on information gathered by astronauts.

Explains how fossils are formed and what they tell us about the past.

Even though Mount Everest measures 29,028 feet high, it may be growing about two inches a year. A mountain might be thousands of feet high, but it can still grow taller or shorter each year. Mountains are created when the huge plates that make up the earth's outer shell very slowly pull and push against one another. Read and find out about all the different kinds of mountains. The earth's continents rest on plates that move slowly across our planet's...

Describes the formation and characteristics of igneous, metamorphic, and sedimentary rocks and how to recognize and collect them.

Explains how and why a thunderstorm occurs and gives safety steps to follow when lightning is flashing.

Explains the challenges that face our planet as trash continues to build up, and teaches the importance of reducing, reusing, and recycling items in order to reduce the amount of waste produced.

"Winds whip. Waves crash. Rain pours down. A superstorm moves across the ocean and gets closer and closer to land. Hurricane watch! Read and find out how hurricanes form, how scientists track the storms, and what you can do to keep yourself safe if one strikes. With colorful illustrations from Taia Morley and engaging text from Melissa Stewart, Hurricane Watch is a look into a powerful natural disaster."--Provided by publisher.

"Machines help make work easier, like when you need to lift something heavy or reach way up high. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw. Can you adjust a seesaw to lift an elephant? What happens when you combine two or more simple machines? Read and find out!"Amazon website.

Answers questions about the ocean, from its shallow waters to its deepest and most mysterious parts.