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Hipervinculo Ciencias de la Tierra y Medioambiente
Gardeners appreciate the value of compost. Called “gardener’s gold,” it adds valuable nutrients to the soil. Many gardeners make their own compost, but others often fail because they put their food sc ...
Soil texture is determined by the relative proportion of sand, silt, clay and small rocks (pebbles) found in a given sample. Sand is gritty to the touch and the individual grains or particles can be s ...
The purpose of this project is to test sunscreens from the lowest number to the highest.People depend on sunscreen to protect their skin from the sun’s ultraviolet radiation.People believe that a high ...
Hipervinculo Física
Energy is stored in the bonds of molecules. When these bonds split apart, the energy released can be used to do work. Breaking apart liquid water molecules into hydrogen and oxygen gas creates an enor ...
Hipervinculo Física
Battery companies market their products by making impressive claims about how durable and reliable their batteries are. But which battery lasts the longest? Will a more expensive, brand name battery r ...
Hipervinculo Física
Have you ever tried to shut the car door on a warm, dry day and experienced a small shock of electricity? How about rubbing your shoes along a carpeted floor to shock your friends or family members? H ...
Hipervinculo Física
Electricity is both commonplace and mysterious.We rely on it every day to run our lights and appliances, but how does it work?An electrical current occurs when electrical charges are in motion.You can ...
Hipervinculo Tecnología
Periscopes were invented to observe things from a hidden position. They were used to see above water from submarines, in all directions from inside a tank, and above ground from trenches by soldiers d ...
Hipervinculo Tecnología
Why does a rock sink in water while a gigantic steel aircraft carrier floats? The aircraft carrier is much heavier, but glides along the ocean surface with ease. Clearly, weight isn’t the entire story ...
Hipervinculo Tecnología
Newton’s First Law of Motion states that when an object is set in motion, it will remain in motion until acted on by an outside force. Theoretically, this could mean you could travel at the same speed ...
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