Search

Search results

Displaying 141 - 150

DK Science: Groundwater

EGYPTIAN OASISFIND OUT MOREGroundwater is water under the Earth’s surface. Most groundwater is found in porous rocks, which have tiny holes in them. If a hole is bored straight down through…

DK Science: Habitats

HABITAT LOSSFIND OUT MOREA habitat is a place where plants and animals live, and provides them with food and shelter. It can be very small, such as a single tree or pond, or vast, such as a…

DK Science: Ice

ICE SHEETSFIND OUT MOREAbout one-tenth of Earth’s dry land and one-eighth of its oceans are covered with ice. This ice is made of snow that collects and becomes compacted (pressed down).…

DK Science: Islands

CONTINENTAL ISLANDSCORAL ISLANDSISLAND ARCSFIND OUT MOREIslands are land masses entirely surrounded by water. They are found in oceans, seas, rivers, and lakes. Islands vary in size from tiny…

DK Science: Lakes

FIND OUT MORELakes form where water fills hollows in the landscape. Some of these hollows are formed by glaciers gouging into the ground, and some are created when river valleys are blocked…

DK Science: Minerals

MINERAL PROPERTIES MINERALS IN ROCK CRYSTALS FIND OUT MORE Minerals are the materials that make up the rocks of the Earth’s crust. Among thousands of different minerals, only a few,…

DK Science: Mountain Building

THE ANDESWORLD MOUNTAIN RANGESHIMALAYAN COLLISIONFOLD FORMATIONBLOCK MOUNTAINSFIND OUT MORENew mountains are built when rocks are pushed upwards by the movement of the giant rocky plates that…

DK Science: Ocean Floor

HYDROTHERMAL VENTSBIOGRAPHY: MARIE THARP American, 1920-FIND OUT MOREJust a century ago, the ocean floor was largely unknown. Now we know that the deep oceans have features such as mountains,…

DK Science: Oceans

COASTAL (NERITIC) ZONEOPEN OCEAN ZONESOCEAN CURRENTSTIDESWAVESFIND OUT MOREAbout 71 per cent of our planet’s surface is covered by oceans and seas. In order of size, the five great oceans are…

DK Science: Plate Tectonics

FRACTURED CRUST PLATE BOUNDARIES SUPERCONTINENT SEA-FLOOR SPREADING FIND OUT MORE Scientists believe that the Earth’s outer crust is made up of about huge fragments, called tectonic…