13950552 - Photons hitting a corner cube retroreflector, illustration11725988 - Mercury pouring from a measuring cylinder13951613 - Phagocytosis of a bacterium, illustration13756595 - Using a 'makeshift' calorimeter13951452 - Action of lysozyme on the cell wall of a bacterium, illustration13378059 - Transverse and longitudinal waves in a spring, illustration13377600 - Shadow cast by a small light source, illustration13377590 - Diffraction of waves in a wide gap, illustration13403180 - Children participating in a science fair13377661 - Prism refracting light into a spectrum, illustration13377658 - Prism refracting light into a spectrum, illustration13377656 - Prism refracting light into a spectrum, illustration13377605 - Reflection in a plane mirror, illustration13376874 - Thermal conduction in a metal, illustration13378081 - Refraction in a fish pond, illustration13477409 - Small clear glass filled with water up to a green line13471703 - Lithium chloride burns with a bright crimson flame13378108 - Heat transfer in a pan on a stove, illustration13377660 - Prism refracting light into a spectrum, illustration13403189 - Child using a thermal imaging camera at a science fair13403178 - Student looking down a microscope13403006 - Children at a science fair13376888 - Convection currents in a saucepan, illustration13403204 - Teenager using a video microscope13377651 - Prism refracting light into a spectrum, illustration13377601 - Shadow cast by a large light source, illustration13376872 - Thermal conduction in a metal, illustration13378100 - Vibrations of a ruler, illustration13378054 - Longitudinal waves in a slinky spring, illustration13376867 - Photovoltaic effect in a solar panel, illustration13403200 - Children participating in a science fair13403186 - Children participating in a science fair13403173 - Mother and child at a science fair13378107 - Heat transfer in a pan on a stove, illustration13378073 - Shadow cast by a large light source, illustration13377653 - Prism refracting light into a spectrum, illustration13376875 - Heat loss from a house, illustration13444439 - Magnetising a needle13376887 - Convection currents in a kettle, illustration13951610 - Budding of a yeast cell, illustration13471710 - Salol crystals on a microscope slide13471704 - Sodium chloride burns with a bright yellow flame13377665 - Colour dispersion in a prism, illustration13377607 - Image position in a plane mirror, illustration13403190 - Children participating in a science fair13378055 - Longitudinal waves in a slinky spring, illustration13377591 - Diffraction of waves in a narrow gap, illustration13403026 - Student looking down a microscope13378071 - Measuring a liquid avoiding parallax error, illustration13403025 - Child looking through a microscope at a science fair13378069 - Shadow cast by a small light source, illustration13377533 - Polarity of a current carrying wire coil, illustration13743834 - Germination of a pollen grain, illustration13403185 - Father and son at a science fair13378072 - Shadow cast by a large light source, illustration13378058 - Transverse and longitudinal waves in a spring, illustration13378105 - Convection current round a room, illustration13377654 - Prism refracting light into a spectrum, illustration13378070 - Shadow cast by a small light source, illustration13471718 - Copper (I) oxide on a watch glass13377599 - Shadow cast by a small light source, illustration13377532 - Magnetic field round a solenoid, illustration13378078 - Refraction in a fish tank, illustration13376986 - Life cycle of a very-low-mass star, illustration12492937 - Magnetizing a metal object with a solenoid, illustration13403205 - Children participating in a science fair13403179 - Children at a science fair13376866 - Photovoltaic effect in a solar panel, illustration12582974 - Drinking through a straw, illustration12492940 - Magnetizing a metal object with a solenoid, illustration13476329 - Hand pouring a jug of water into container of oil and syrup12584253 - Archer with a longbow, illustration12582966 - Pressure exerted by finger pushing a nail into wood, illustr12492930 - Demagnetizing a metal object with a solenoid, illustration11714567 - Candle in a bell jar13471716 - Iron (II) chloride on a watch glass13378114 - Thermal conduction in a metal, illustration12492938 - Magnetizing a metal object with a solenoid, illustration13377609 - Reflection in a plane mirror, illustration12584264 - Weighing an apple on a newton meter, illustration12492949 - Attracting a compass needle with a magnetized object13403007 - Children participating in a science fair13378052 - Transverse waves in a slinky spring, illustration13377692 - Electric bell in a vacuum, illustration13377659 - Prism refracting light into a spectrum, illustration13377610 - Reflection in a plane mirror, illustration12492967 - Magnetic field of a bar magnet, illustration12492961 - Magnetic field of a bar magnet, illustration12492945 - Repelling a compass needle with a magnetized object13403027 - Scientist explaining diatoms at a science fair13378113 - Thermal conduction in a metal, illustration13377531 - Magnetic field round a solenoid, illustration12584261 - One kilogram mass on a newton meter, illustration12584256 - Archer with a longbow, illustration12492935 - Magnetizing a metal object with a solenoid, illustration12492928 - Demagnetizing a metal object with a solenoid, illustration13377606 - Reflection in a plane mirror, illustration13377602 - Shadow cast by a large light source, illustration13377528 - Magnetic field around a bar magnet, illustrationpage suivante
