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Revista Naturalmente (Museo de Ciencias Naturales de Madrid)

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Revista Naturalmente (Museo de Ciencias Naturales de Madrid)

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La revista del Museo Nacional de Ciencias Naturales  Accede a todos los números Suscríbete  NÚMERO 44 Diciembre 2024 2 3 La educación ambiental es clave para

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Ambientech: Ciencias, Salud y Medio ambiente. Educación Secundaria

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Ambientech: Ciencias, Salud y Medio ambiente. Educación Secundaria

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Ambientech es un portal educativo gratuito con contenidos de ciencias, salud y medio ambiente para educación secundaria. ¡Didáctico y divertido!

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El ser humano, desde que está en sociedad, parece buscar incansablemente eso que conocemos como progreso. El mejorar, el ir más allá, el descubrir nuevas formas de llegar más lejos, de crecer, tanto espiritual como físicamente, logrando mejorar nuestro nivel de vida general. El progreso nos lleva muchas veces a enfrentarnos a dilemas morales, como los que se están dando en los últimos tiempos con la tecnología y la medicina. ¿Se debe aprovechar cualquier avance tecnológico para mejorar nuestra salud? ¿Para corregir "errores" naturales, como enfermedades en el feto antes de nacer? Este tipo de preguntas son habituales en los últimos tiempos porque estamos llegando a un punto en el que el ser humano puede crear prácticamente lo que quiera, y ese jugar a ser Dios se nos puede volver en contra.

El progreso no se mide solo en los avances médicos y tecnológicos, porque de hecho, estos son consecuencia y causa a la vez del propio progreso. Si somos como somos, la especie dominante en el planeta, no ha sido gracias a nuestra fuerza bruta, sino a nuestra inteligencia. Esa que permitió a nuestros antepasados colocarse por encima de sus coetáneos, y que nos ha llevado a desarrollar todo el sistema cultural que tenemos hoy en día, así como a idear herramientas e inventos que nos faciliten mucho más la vida... tal vez demasiado. En los últimos años parece estar produciéndose un efecto curioso en cuanto a la inteligencia universal del planeta, que parece haberse estancado o incluso retraído, después de décadas, seguramente siglos, de avance. ¿Cómo se puede medir esto? A través de los índices de inteligencia, como el coeficiente intelectual. Todo ello generaba el llamado Efecto Flynn, que parece estar desapareciendo en estos últimos años.

El mundo de los sueños siempre nos ha parecido francamente fascinante, y no es para menos. Cada noche, muchos de nosotros vivimos historias fascinantes que, por muy inverosímiles que puedan llegar a parecernos, nos tomamos tan en serio que a veces siguen rondando nuestra cabeza incluso días después de haberlas soñado.
Este terreno resulta tan fascinante que hay personas que han dedicado toda su vida a estudiar la llamada 'ciencia del sueño'. No obstante, tras miles de años de historia este enigmático mundo sigue dejando muchas puertas abiertas a la imaginación ya que, a día de hoy, no es posible responder a todas las preguntas que nos planteamos en relación a los sueños. Pese a ello, a lo largo de todo este tiempo de investigación se ha ido encaminando esta ciencia hasta tal punto que cada vez estamos más cerca de poder materializar nuestros sueños mediante grabaciones. Sin embargo, hoy por hoy sentimos que nos queda mucho para lograr comprender lo que ocurre en nuestra mente cada noche, mientras dormimos.

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El ser humano, desde que está en sociedad, parece buscar incansablemente eso que conocemos como progreso. El mejorar, el ir más allá, el descubrir nuevas formas de llegar más lejos, de crecer, tanto espiritual como físicamente, logrando mejorar nuestro nivel de vida general.

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Welcome to the new NASA website. We're working to continuously improve your web experience. If you don't find what you are looking for, give feedback.

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The Natural History Museum is a world-class visitor attraction and leading science research centre. We use our unique collections and unrivaled expertise to tackle the biggest challenges facing the world today. Explore a story of natural history discovery in an interactive experience, Making Natural History, voiced by Museum researchers and curators. Dive into the museum's 80 million objects with unique, new features: encounter a prehistoric marine reptile in virtual reality, discover pioneering Museum research in a short film, navigate the galleries in 360 degrees care of Google's Street View team, take a tour of ten new exhibits tackling natural history themes, and take students on an expedition through the galleries to learn about adaptation in the natural world.

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The Natural History Museum, London, United Kingdom - Google Arts & Culture

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The Natural History Museum is a world-class visitor attraction and leading science research centre. We use our unique collections and unrivaled expertise t...

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Home | Museo Nacional de Ciencias Naturales

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Museo Nacional Ciencias Naturales Madrid

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Earth | NASA Space Place – NASA Science for Kids

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Articles, games and activities about our home planet

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El ciclo del agua- USGS Servicio Geológico de EEUU

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El ciclo del agua- USGS Servicio Geológico de EEUU

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Back to the water cycle on the USGS Water Science School.

Fog

Fog is just a cloud that happens to be hanging around on the Earth's surface.

Fog contains very tiny liquid water particles, like a cloud, and floats, like a cloud. Actually, fog IS a cloud, but one that swirls around your feet instead of high in the sky. Fog forms when air containing invisible water vapor encounters cooler temperatures (here, next to the ground) and the water vapor condenses out into liquid water-the cloud.

In this picture, as the day warms the air next to the ground will warm, too, and the fog particles will again evaporate back into invisible water vapor.

Groundwater flow

If you pour a glass of water onto the ground it usually sinks right in ( infiltration), so you can imagine how much water sinks into the ground during a major storm ( Find out here). Here in Atlanta, Ga, USA it rains about 50 inches/year. Over a 100 square mile (10 miles by 10 miles) area that means 87,000 billion gallons of water falls, with much of it soaking into the ground to recharge groundwater.

Yes, water below your feet is moving all the time, but, no, if you have heard there are rivers flowing below ground, that is not true.

Groundwater flow. Relate to recharge a battery.

Groundwater

When you are standing on the ground, you're not only standing on dirt, but on water-a lot of water. The dirt and rock below your feet contains lots of spaces and cracks, and water can exist in these open spaces. In fact, over 20 times the amount of water in all of Earth's rivers and lakes is in the ground.

When you pour a glass of water on your yard, the water sinks (infiltrates) into the ground and gets back into being a vital part of the global water cycle.

Of course, the rock underground is different all over the world, so how much and where water occurs of water underground is different everywhere. Deep in the ground, the rock becomes very hard and solid (no open spaces to hold water), and it also gets very hot, so no liquid water is found deep in the Earth.

Ice and snow

Ice and glaciers are part of the water cycle, even though the water moving in them changes very slowly. The amount of ice on the Earth goes up and down as the world's climate cools and warms over thousands of years.

Lucky for us we're now in a warmer phase of the Earth's history, but the last Ice Age was only 18,000 years ago. At that time, ice covered the northern part of North America.

Ice and glaciers are still around today, as this picture shows. In fact, most of the world's freshwater, about 68 percent, is locked up in ice, snow, and glaciers.

Oceans

If you look at this picture (or click on it for a larger version) you see that "tiny" blue ball sitting in the middle of the United States-if all the water on, in, and above the Earth was collected in one big ball, this is the size it would be.

The oceans are, by far, the largest reservoir of water on earth-over 96% of all of Earth's water exists in the oceans.

Oceans are important to the water cycle because almost all the water that evaporates from liquid to water vapor (which forms clouds) comes from the oceans.

Precipitation

The air is full of water, even if you can't see it. Higher in the sky where it is colder than at the land surface, invisible water vapor condenses into tiny liquid water droplets-clouds. When the cloud droplets combine to form heavier cloud drops, it can start to rain, snow, hail....all forms of precipitation.

The amount of precipitation that falls is different all around the world. In deserts, such as in Chile, it may only rain one inch per year, while on some mountains in Hawaii and in India, it can rain more than 600 inches per year. That is almost 2 inches every day!

Precipitation is the "exit ramp" back to earth from the water-cycle superhighway in the sky that is moving clouds all around the globe.

Rivers

Most of the rain that falls stays on the land surface and, due to gravity, starts running downhill. This runoff water will accumulate in creeks ... I mean, in streams ...no, I mean, in rivers. Actually, no matter what you call them, rivers are responsible for moving a lot of water off of the land and back into oceans.

Of course, plants, animals, and people interact with rivers, as all kinds of life seems to thrive around rivers. If you look at a map of the world, you see how people naturally build their cities next to rivers.

And, as this satellite picture of the Nile River in Egypt, you can often pick out the rivers because of the green growth growing along them.

Seepage

You know all about seepage. When you spill your red fruit drink onto your Mom's white carpet, she rushes (after glaring at you) to get a sponge to soak up the liquid before it "seeps down into the carpet".

With the water cycle, seepage occurs when precipitation falls on the landscape and starts to soak into the ground. The "Why?" this happens is simply gravity. But, seepage doesn't just happen downward! Water seeps upwards and sideways, too, from the ground into the bottom of rivers, lakes, and the oceans. Some of the water you see flowing in a river has come up from the ground.

The Sun

Who's the Boss? The sun is the real boss of the water cycle, and it doesn't even live here on Earth. The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go-energy, or heat.

The sun's heat allows liquid water to evaporate into water vapor, which in the main way water gets from the land surface back into the sky.

The sun also participates in moving water around the Earth by being the reason winds exist. The winds move clouds and the weather all over the place; all of this mixing up and moving is an important part of the water cycle.

Evapotranspiration (Evaporation and transpiration)

When a person breathes, their breath contains water molecules. All the plants around you are "breathing" and releasing water, too. The term is called "transpiration", and although a brussels sprout doesn't have a mouth, it has tiny holes in its leaves that allow water to leave the leaf, via evaporation, and go into the air.

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Interactive Water Cycle Diagram for Kids (Intermediate)

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The Water Cycle for Kids, from the USGS Water Science School.

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AVENTURA GRÁFICA ¿Quieres proteger la Geodiversidad de nuestro planeta? Rusty Hammer es un multimillonario sin escrúpulos que navega alrededor del mundo en su lujoso mega-yate en busca de nuevas formas de incrementar su fortuna.

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Instrucciones

Es recomendable jugar desde un ordenador; aunque es posible jugar desde dispositivos móviles y tablets, se pierde parte de la optimización de pantalla.

El número de jugadores simultáneos oscila entre 1 y 6, aunque sólo es posible jugar la misma partida desde un único ordenador.

Se trata de un juego multi-respuesta con preguntas agrupadas en 6 categorías. Cada vez que se acierta una pregunta se obtiene la gema que corresponde al color de esa categoría.

Los fallos en las respuestas no suponen la pérdida de la gema de dicha categoría si ya se había conseguido previamente.

Si se cae en la casilla central del tablero se puede elegir el color de la pregunta.

Ganará el juego quien antes obtenga todas las gemas de su martillo y consiga llegar a la casilla central. Ahí se enfrentará a 6 preguntas, una pregunta de cada categoría, de las que deberá acertar como mínimo 4.

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Es recomendable jugar desde un ordenador; aunque es posible jugar desde dispositivos móviles y tablets, se pierde parte de la optimización de pantalla. El número de jugadores simultáneos oscila entre 1 y 6, aunque sólo es posible jugar la misma partida desde un único ordenador.

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