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Book Chapter
Waves are among the most common phenomena in nature. Waves breaking in the ocean, sound, light, microwaves, radio, or the motion of a guitar cord or a...
Book Chapter
What are some of the ways you can make waves in water? Have you ever jumped into a pool or lake and done a “cannonball”? This makes waves. The lar...
Book Chapter
Tanks a Lot—Activities for a Wave Tank (Teacher Demonstration)
Some concepts related to waves, though, are difficult to demonstrate in the classroom. They require observing water waves on a scale that is not ordin...
Book Chapter
Anyone who has been to the coast realizes there is a rhythm to the ocean. Waves crash onto the beach or rocks. The water they carried washes ashore, t...
Book Chapter
The Sun, Moon, and Earth are three extremely large objects separated by great distances. Despite the large distances between them, each object affects...
Book Chapter
The Bulge on the Other Side of Earth
The bulge of water on the side of Earth that faces the Moon is easily explained. It is due to the gravitational attraction between the Moon and Earth,...
Book Chapter
Telephones, clothing, skis, antihistamines, ballpoint pens, music cassettes, toilet seats, antifreeze, and gasoline: What do these items have in commo...
Book Chapter
Hundreds of thousands of boats and ships and the materials and supplies on them have sunk to watery graves since humans first sailed the oceans. Even ...
Book Chapter
A substance’s molecular structure is responsible for its properties and governs how it interacts with other things on Earth. This Activity introduce...
Book Chapter
Water has many peculiar properties: high specific heat capacity, strong ability to act as a solvent, and the ability of the solid phase of water (ice)...
Book Chapter
Water is one of the simplest chemical substances on Earth, and yet we must have it to live. In this Activity, you will learn how hydrogen and oxygen j...
Book Chapter
The characteristics of the different parts of the ocean vary depending on the region. While the coastal ocean changes rapidly and presents the largest...
Book Chapter
Over and Under— Why Water’s Weird
Understanding water’s molecular structure helps explain some of its characteristics. Density is the mass of an object divided by its volume. In this...
Book Chapter
The Tides: A Balance of Forces
The interaction between the gravitational forces of Earth, the Moon, and the Sun causes tides. The rhythmic movement of the water associated with the ...
Book Chapter
Earth’s surface is mostly covered by water. Areas not covered by water—the continents—are surrounded by water. If land and water had the same sp...