Patricia Armentrout

Volcanoes are present in different areas throughout the world but share many common characteristics. This book describes in words and fascinating images what volcanoes are, the parts of a volcano, dormant volcanoes, the Ring of Fire, hot spots, and deadly eruptions.

Updated for 2020. Banks and their uses are described in this book, which includes details such as who works in banks, why banks are necessary, and what special equipment bankers use.

Introduces wedges, including how they function and how they are used in everyday objects to make life easier.

Discusses different ways people have paid for things throughout history, including barter, cash, credit cards, and checks.

Briefly describes how money and its value are protected by banks, guards, and budgets.

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

Text and pictures introduce the inclined plane, a simple machine consisting of a slanted surface or ramp to make work easier.

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

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

Describes various water vehicles and their uses, including an aircraft carrier, hydrofoil, and airboat.