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DK Science & Technology: Industry

WHAT ARE PRIMARY INDUSTRIES? WHERE ARE INDUSTRIES LOCATED? WHAT IS A COTTAGE INDUSTRY? RAW MATERIALSFIND OUT MOREIndustry is a general term meaning the businesses and organizations that provide…

DK Science & Technology: Internet

HOW DOES THE INTERNET WORK? WHAT IS THE WORLD WIDE WEB? WHAT IS HYPERTEXT? BIOGRAPHY: TIM BERNERS LEE British, 1955- MARC ANDREESSEN American, 1971-SEARCH ENGINESFIND OUT MOREThe global computer…

DK Science & Technology: Lenses

WHAT DOES A LENS DO? WHAT IS THE DIFFERENCE BETWEEN A MICROSCOPE AND A TELESCOPE? CONVEX LENSCONCAVE LENSFIND OUT MOREWhen you look through a magnifying glass, or take a picture with a camera, you…

DK Science & Technology: Light

WHAT IS LIGHT? HOW DOES LIGHT TRAVEL? WHAT ARE SHADOWS? WHAT MAKES SOME MATERIALS OPAQUE? REFLECTIONREFRACTIONLASERFIND OUT MORELight is a type of energy known as electromagnetic radiation. It is…

DK Science & Technology: Machines

WHAT IS MECHANICAL ADVANTAGE? HOW IS A MACHINE’S EFFICIENCY MEASURED? LEVERSPULLEYSINCLINED PLANESGEARSFIND OUT MOREFrom can openers to cranes, machines make work easier. Simple machines include…

DK Science & Technology: Magnetism

WHAT ARE MAGNETIC POLES? WHAT ARE MAGNETIC MATERIALS? HOW DOES A MAGNETIC COMPASS WORK? MAGNETIC DOMAINSMAGNETIC FIELDFIND OUT MOREMagnetism is an invisible force that attracts or repels some…

DK Science & Technology: Manufacturing

WHERE DO NEW PRODUCTS COME FROM? WHAT IS MASS PRODUCTION? BIOGRAPHY: HENRY FORD American, 1863–1947 PRODUCTION LINEFIND OUT MOREFrom ankle socks to aircraft, almost everything we use has been…

DK Science & Technology: Materials

WHAT ARE MATERIALS’ PROPERTIES? HOW STRONG IS A SPIDERWEB? HOW ARE MATERIALS USED? SYNTHETICSFIND OUT MOREAny substance that is used to make something is a material. Natural materials such as stone…

DK Science & Technology: Mathematics

WHAT ARE MATHEMATICAL MODELS? WHAT IS SCIENTIFIC NOTATION? FIND OUT MOREMathematics explores the properties (characteristics) of numbers, shapes, and space. Using math, scientists can describe…

DK Science & Technology: Matter

WHERE DOES MATTER COME FROM? WHAT ARE STATES OF MATTER? WHAT ARE FUNDAMENTAL PARTICLES? MASSFIND OUT MOREDust, living things, oceans, mountains, and planets—everything you can touch is made from…