This site provides a detailed account of the sinking of the Tuscania by a German U-Boat. Includes images and firsthand accounts of the attack.

Students will learn about how the Earth's carbon cycle works, as they examine the relationship between levels of carbon dioxide and water vapor in the atmosphere and the temperature of the ocean's surface. Includes online student...

Students find the densities of objects based on sinking or floating in this activity that demonstrates Archimedes Principle.

This site, geared toward English as a Second Language students, provides "Water Under the Sink" as a reading exercise and audio translation. Multiple choice questions, vocabulary practice, close exercises, crosswords, closed questions,...

After the teacher puts pieces of potatoes in water and salt water, the students predict what is going to happen and try to name what makes this happen.

By the end of this section, you will be able to define buoyant force, state Archimedes' principle, understand why objects float or sink, and understand the relationship between density and Archimedes' principle.

Learn why some things will float or sink.

This interactive brainteaser from the NOVA: "Voyage of Doom" Web site challenges you to figure out what causes an object to sink.

A review of the sinking of a South Korean ship by North Korea, & the actions of retribution taken so far. The final discussion revolves around the critical importance that China plays in this, and the influence it can lever either...

Young scholars use modeling clay, a material that is denser than water and thus ordinarily sinks in water, to discover the principle of buoyancy. They begin by designing and building boats out of clay that will float in water, and then...

An extensive history of the Confederate submarine, H.L.Hunley, the first submarine to sink a warship. Also information about two earlier prototypes.

An informative new resource devoted to the RMS Titanic! Click on any of the main topics for additional details on construction, maiden voyage, sinking of the ship, survivors, artifacts, newspaper articles, videos, and more.

This site provides a short article on the history of the first submarine to engage and sink a warship. Many links to information about its history, preservation and excavation. Includes original US and Confederate Navy documents.

This guide engages children in the process of scientific inquiry using the context of a favorite early childhood pastime-water play.

Interesting information and fun facts about the sinking of the Titanic disaster in 1912.

Letters from Albert C. Lynn of the MARBLEHEAD giving his account of what he saw and heard about the preparations for the sinking of the collier MERRIMAC at the entrance to Santiago harbor during the Spanish-American War.

Read about the sinking of the Luisitania in 1915 and find out about how it affected the American desire to enter World War I.

Use a condiment packet as a Cartesian diver to show how pressure changes cause the "diver" to float, sink or hover.

This lesson teaches the concept of measurement using grams and ounces through a student-created experiment. The students will get to test their own scientific predictions by constructing a boat and trying to sink it. This lesson provides...

Thought provoking entry discusses the many outrageous ideas about the so-called mysterious disappearances of the Bermuda Triangle area in the Atlantic Ocean.

Concise account of the destruction of the German navy's flagship, the Bismarck, during World War II.

Describes the events leading up to America's entry into World War I and the changes that took place in America soon after. These included legislation such as the Selective Service Act and the Espionage and Sedition Acts, protests by...

Article presents facts about the attitude of Americans towards the war, the reasons for US entry, and significant events.

Thirty interesting facts about World War 1 include the causes of the Great War, the American Expeditionary Force (AEF), the countries of the Allies and Central Powers, the American troops, WW1 weapons and the different types of warfare...