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DK Science: Friction

LUBRICATING MACHINERYSTREAMLININGFIND OUT MOREIf you kick a ball across a playground, it bounces and rolls on the ground’s rough surface and soon comes to a halt. What slows it down is friction…

DK Science: Fungi

SOAKING UP FOODYEAST-COVERED GRAPESEXPLODING PUFFBALLMOULDSLICHENSFIND OUT MOREFungi grow without sunlight and feed on organic matter. A typical fungus is made of many threads growing on or in…

DK Science: Galaxies

SPIRAL GALAXY ESO 510-G13IRREGULAR GALAXYELLIPTICAL GALAXYBIOGRAPHY: EDWIN HUBBLE American, 1889–1953MILKY WAYFIND OUT MOREStars are not scattered evenly throughout the Universe. Instead, they…

DK Science: Gases

EXPANSIONPRESSUREFIND OUT MOREGases are all around us, but although many, such as perfume, can be smelt, most gases are invisible. Like liquids, gases can flow but, unlike solids or liquids,…

DK Science: Generators

WIND TURBINEHOW AN ALTERNATOR WORKS 1HOW AN ALTERNATOR WORKS 2WIND FARMFIND OUT MOREGenerators convert energy from such sources as oil, gas, and wind into electrical energy. Like motors, they use…

DK Science: Genetics

LOCATION OF CHROMOSOMES CHROMOSOME STRUCTURE DNA DOUBLE HELIX CHROMOSOME SET GENES INHERITANCE FIND OUT MORE Genetics is the study of the instructions, contained in cells, for how our…

DK Science: Glass

COLOURING GLASSMAKING GLASSGLASS TECHNOLOGYFIND OUT MOREFirst made over 5,000 years ago, glass is a thick liquid that never completely sets (hardens). That is why old window panes are thicker…

DK Science: Gravity

CENTRE OF GRAVITYFALLING FORCEMASSFIND OUT MOREGravity is the force that makes things fall to the ground on Earth and holds the planets in their orbits (paths) around the Sun. The force of…

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: Growth

SKULL GROWTH BONE GROWTH SKILLS DEVELOPMENT IN YOUNG CHILDREN PUBERTY AGEING FIND OUT MORE The processes of growth and development continue throughout life. They include physical…