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DK Science & Technology: Forces

WHAT CAN FORCES DO? HOW CAN YOU MEASURE A FORCE? WHAT ARE BALANCED FORCES? GRAVITYFIND OUT MOREWhen you strike a ball with a bat, stretch a rubber band, or lift a suitcase, you are applying a force.…

DK Science & Technology: Genetics

WHAT IS THE GENETIC CODE? WHAT IS A GENOME? BIOGRAPHY: FRANCIS CRICK English, 1916- JAMES WATSON American, 1928- HUMAN GENOME PROJECTDNA FINGERPRINTFIND OUT MOREGenetics is the study of how living…

DK Science & Technology: Heat

HOW DOES HEAT FLOW? WHAT ARE THE THREE TYPES OF HEAT TRANSFER? CAN WE SEE HEAT? TEMPERATURETHERMOMETERSTHERMAL INSULATORSFIND OUT MOREEverything around us contains heat. Heat is a form of energy—…

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…