AIR PRESSUREWATER PRESSUREFIND OUT MOREWhen you press or push something, the force you apply is called pressure. Pressure is measured as the force you use divided by the area over which you use…
AM SPECTRUMDIGITAL RADIOFIND OUT MORERadio depends on electricity and magnetism working together to make waves that travel through space at the speed of light. When you tune in your radio, you…
DANGER: RADIATIONTYPES OF RADIOACTIVITYRADIOTHERAPYFIND OUT MOREThe atoms of some chemical elements are unstable. They try to rearrange themselves to make more stable atoms. In the process, they…
RAINBOWTHE WATER CYCLEHAILSNOWFIND OUT MOREThe moisture gathered in clouds eventually falls to the ground as liquid rain or drizzle, or as solid, frozen SNOW or HAIL. Any kind of falling…
LANDFILL SITESROLLING STEELSHEET STEELRECYCLING PAPERRECYCLED PLASTICBIODEGRADABLEFIND OUT MOREMany things we normally throw away can be recycled (used again), including paper, glass, metals,…
IRREGULAR REFLECTIONMIRRORSFIND OUT MOREReflections are usually caused by shiny things, such as MIRRORS, that show a reversed image of whatever is placed in front of them. The image seems to be…
PUZZLE FOR THE EYEREFRACTION IN HEAT HAZEMIRAGEFIND OUT MORELight rays usually travel in straight lines, but when they pass from one material to another they can be forced to bend (change…
ACCURATE TIMEKEEPINGBIOGRAPHY: ALBERT EINSTEIN German, 1879–1955FIND OUT MOREEinstein realized that the speed of light is always the same. He then calculated that an object travelling near this…
CROCODILE EGGSROLE REVERSALASEXUAL BUDDINGLIVE YOUNGFERTILIZATIONFIND OUT MOREAnimals reproduce in one of two ways. In asexual reproduction, animals produce young, which are identical to…
POISONOUS FANGSKOMODO DRAGONCLASS: REPTILIAFIND OUT MOREReptiles are ectothermic (cold-blooded) animals. They cannot generate their own body heat and many bask in the sun to get warm. Tough…
