"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.

"In the ocean, sharks are near the top of the food chain. Sharks have the same five senses as humans do, but they have an extra sixth sense that makes them especially deadly hunters. What is this sense and how does a shark use all six senses to track down prey?"--Amazon.com.

Describes different types of clouds and how to identify them.

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.

Discusses the discovery and analysis of Archaeopteryx, a feathered dinosaur which may have been an ancestor of modern birds.

"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.

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

Simple language and humorous illustrations show how forces make things move, prevent them from starting to move, and stop them from moving.