Showing results by author "Sally M. Walker" in All Categories

December 6, 1917, started like any other day in Halifax. But everything stopped shortly before nine o’clock that morning, when two ships collided in Halifax Harbour. One of the ships was loaded with munitions for the troops fighting in Europe; the other was preparing to collect medical...

How did the colonists of Jamestown and Maryland live and die? Forensic anthropology provides an incredible array of answers. Scientists can look into a grave and determine the skeleton's gender, age at time of death, nationality, and sometimes even economic standing within minutes. Laboratory studies can provide cause of death information.

BONUS FEATURE: Enhanced CD featuring photos, maps, and illustrations from the book. For more than one hundred years, a submarine lay buried beneath the ocean floor near Charleston, South Carolina. This Civil War stealth weapon–the H. L. Hunley–made history in 1864 as the first submarine ever...

Minerals are fascinating resources that have a variety of uses. A diamond is a mineral that is sought after for its beauty. Salt is a useful mineral that adds flavor. But do you know what minerals are made of? Or how to identify a mineral? Explore the amazing world of minerals in this book.

Soil can be found almost everywhere on Earth. Sand is a soft soil that is found in deserts. Loam is soil that is great for growing plants. But how are these types of soils different? And how are they made? Explore the amazing world of soil in this book.

People, animals, machines, and wind all make sounds. But have you ever seen how sound waves move? Or made a sound wave bounce? Now you can! Explore sound with the fun experiments you'll find in this audiobook. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how does energy work? Hands-on experiments will help you find the answer!

In 1865, the Civil War was winding down and the country was reeling from Lincoln's assassination. Thousands of Union soldiers, released from Confederate prisoner-of-war camps, were to be transported home on the steamboat Sultana. With a profit to be made, the captain rushed repairs to the ship so the soldiers wouldn't find transportation elsewhere. More than 2,000 passengers boarded in Vicksburg, Mississippi...on a boat with a capacity of 376.

Rocks can be made of many different minerals. By looking at rocks closely, we can tell where they were formed and what conditions they were created in. How do we know these things? And how do we tell different types of rocks apart? Learn about ways to research rocks and what they can teach us about our world.

Electricity powers lights, computers, and television sets. But have you seen how electricity can make objects stick together? Or make other objects pull apart? Now you can! Explore electricity with the fun experiments you'll find in this audiobook. As part of the Searchlight Books™ collection, this series sheds light on a key science question: How does energy work? Hands-on experiments will help you find the answer!

The sun, lightbulbs, and flickering fires all bring light to our world. But have you ever watched light rays move? Or saw how light rays reflect off objects? Now you can! Explore light with the fun experiments you'll find in this audiobook. As part of the Searchlight Books™ collection, this series sheds light on a key science question: How does energy work?

The sun, furnaces, and ovens all make heat. But have you ever watched matter expand when it is heated? Or learned how different kinds of matter conduct heat? Now you can! Explore heat with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question: How does energy work?

Fossils give us a window to the past. Water, sediments, and pressure work together over time to preserve the shape of things that lived long ago. Studying these ancient plants and animals tells us more about our own existence. Have you ever searched for fossils? Unearth some in this audiobook.

Solids, liquids, and gases are the three states of matter. But have you ever made matter change from one state to another? Or seen how even invisible matter takes up space? Now you can! Explore matter with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how does energy work? This audiobook will help you find the answer!

What do staircases, dump truck beds, and ramps have in common? All of them are inclined planes! Inclined planes are simple machines. They help us to do jobs more easily. But don't take our word for it. Put inclined planes to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - How Do Simple Machines Work? Hands-on experiments will help you find the answer!

What do a doorstop, a butter knife, and the front of a boat have in common? All of them are wedges! Wedges are simple machines. They help us to do jobs more easily. But don't take our word for it. Put wedges to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

What do hammers, wheelbarrows, and brooms have in common? All of them are levers! Levers are simple machines. They help us to do jobs more easily. But don't take our word for it. Put levers to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

What do bicycles, doorknobs, and screwdrivers have in common? All of them use wheels and axles to perform work! Wheels and axles are simple machines. They help us to do jobs more easily. But don't take our word for it. Put wheels and axles to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

What do jar tops and water-bottle lids have in common? Both of them are screws! Screws are simple machines. They help us to do jobs more easily. But don't take our word for it. Put screws to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - How Do Simple Machines Work? Hands-on experiments will help you find the answer!

What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But don't take our word for it. Put pulleys to the test with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question - how do simple machines work? Hands-on experiments will help you find the answer!

You know that magnets hold pictures on a refrigerator. But have you ever found a magnet's north pole? Or turned an ordinary paper clip into a magnet? Now you can! Explore magnetism with the fun experiments you'll find in this book. As part of the Searchlight Books™ collection, this series sheds light on a key science question: how does energy work? Hands-on experiments will help you find the answer!