National Geographic: Encyclopedia: Ocean Trench

"If global warming is real, why is it so cold?" Distinguishing the difference between weather and climate is important when it comes to understanding our planet. In these activities, young scientists look at the climate patterns in a...

Take young scientists into the depths of the world's ocean with the second lesson of this three-part earth science series. After first drawing pictures representing how they imagine the bottom of the ocean to appear, students...

An unfortunate spill of 92,000 rubber ducks into the ocean in 1992 elicited invaluable information about global ocean currents as scientists tracked their journeys around the world. In this lesson, students first learn about the Ocean...

Students learn about James Cameron's Challenger Deep dive and about the marine animals that live in different layers of the ocean. They then study the characteristics of the hadalpelagic zone at the bottom of the ocean, and imagine and...

Dora, Dora, Dora, Dora, Dora! This may be your little ones' best guess as to what it's like to be an explorer! Give them a deeper understanding with this compact examination. A four-minute video introduces them to Robert Ballard,...

An encyclopedia entry defining and giving examples of climates. Learn how a climate is related to its weather. Entry contains both pictures and vocabulary.

Using data visualizations that show dissolved oxygen levels, students analyze the health of the Chesapeake Bay watershed. They will also learn about dead zones, which are aquatic areas where there is insufficient oxygen to support life....

The giant clam is often portrayed as a monster of the ocean, but it is actually a rather peaceful ocean dweller. This species can grow up to four feet long! Learn more in this National Geographic video clip.

Orcas, more commonly known as killer whales, are featured on this multimedia site. These video clips, audio clips, photographs and facts will be very beneficial to students doing research projects.

Learners determine Earth's deepest trench, outline continents, major ocean mountains, and trenches on color-key map using Crayola Erasable Colored Pencils, identify oceans' geographic features, locate significant oceanic features around...