Armentrout, Patricia

Describes various kinds of lights seen in the sky including rainbows, lightning, and the aurora borealis.

Explores the nature, location, and causes of hot springs, including those that gush hot water and steam into the air and are called geysers.

Describes different kinds of submersibles, ships that can go underwater, including submarines, bathyscaphes, and the ABE or Autonomous Benthic Explorer.

Briefly describes some unusual land vehicles, such as all-terrain vehicles, Indy cars, jet cars, dragsters, tanks, and solar cars.

Describes special machines such as snowmobiles, snow plows, ice breakers, and tundra buggies which are used to remove or travel on ice and snow.

Text and pictures introduce the wheel, a simple machine used primarily to make it easy to move heavy loads.

Text and pictures introduce the wedge, a simple machine placed between objects to split, tighten, or secure a hold.

Text and pictures introduce the screw, a simple machine used primarily as a fastening device.

Text and pictures introduce the pulley, a simple machine used primarily to lift heavy objects.

Text and pictures introduce the lever, a simple machine used to change force and motion.