Showing posts with label Life on Earth. Show all posts
Showing posts with label Life on Earth. Show all posts

Sunday, January 10, 2021

WHAT IS WATER TEMPERATURE? - A property that is unique to water versus other substances is that it is most dense at 4 degrees Celsius, or 39 degrees Fahrenheit, and is less dense at either higher or lower temperatures. Most other substances continue to become denser as their temperature drops. Water at higher or lower temperatures will float on top of water that is 4 degrees C. Because ice is less dense than the underlying water, it floats, insulating the warmer water below. Without this unique property, life on Earth would probably not exist. Water temperature, expresses how hot or cold the water is. Heat is an indicator of the kinetic energy of water, or energy of motion. Increasing temperature indicates increasing energy, or molecular motion, of water. Water temperature affects the growth and reproduction of living organisms. Many animals use temperature as a signal for when to reproduce and when to migrate. Generally, animals and plants grow faster at warmer temperatures, although all organisms have an upper temperature limit. Water temperature has a tremendous impact on water density. Differences in water temperature and density cause stratification. A property that is unique to water versus other substances is that it is most dense at 4 degrees Celsius, or 39 degrees Fahrenheit, and is less dense at either higher or lower temperatures. Most other substances continue to become denser as their temperature drops.

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What is water temperature?

Water temperature affects the growth and reproduction of living organisms

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A property that is unique to water versus other substances is that it is most dense at 4 degrees Celsius, or 39 degrees Fahrenheit, and is less dense at either higher or lower temperatures. Most other substances continue to become denser as their temperature drops. Water at higher or lower temperatures will float on top of water that is 4 degrees C. Because ice is less dense than the underlying water, it floats, insulating the warmer water below. Without this unique property, life on Earth would probably not exist.

By Fondriest Staff 

 

UPDATE: Fondriest Environmental has a new water quality online knowledge base. This resource provides an updated and comprehensive look at water temperature and why it is important to water quality. To learn more, check out: Water Temperature.


Water temperature, of course, expresses how hot or cold the water is.

Technically, heat is an indicator of the kinetic energy of water, or energy of motion.

Increasing temperature indicates increasing energy, or molecular motion, of water.

Why is water temperature important?

Water temperature affects the growth and reproduction of living organisms.

Many animals use temperature as a signal for when to reproduce and when to migrate.

Generally, animals and plants grow faster at warmer temperatures, although all organisms have an upper temperature limit.

Water temperature has a tremendous impact on water density. Differences in water temperature and density cause stratification.

A property that is unique to water versus other substances is that it is most dense at 4 degrees Celsius, or 39 degrees Fahrenheit, and is less dense at either higher or lower temperatures.

   Most other substances continue to become denser as their temperature drops.

Water at higher or lower temperatures will float on top of water that is 4 degrees C.

Because ice is less dense than the underlying water, it floats, insulating the warmer water below.

Without this unique property, life on Earth would probably not exist.

How is water temperature measured?

Temperature is usually expressed in degrees Fahrenheit or Celsius.

Zero degrees Celsius is equal to 32 degrees Fahrenheit, and 25 degrees Celsius is equal to 77 degrees Fahrenheit.

Temperature Measurement Technology

Water temperature can be measured with a thermistor, which is a metallic device that undergoes a predictable change in resistance in response to temperature changes.

This resistance is measured and converted to a temperature reading in Celsius, Fahrenheit, or Kelvin.

Fondriest Environmental is the trusted partner you can turn to for help with environmental monitoring projects. We can assist in everything from planning and monitoring to systems integration, equipment calibration and even staff training. We produce the Environmental Monitor to provide the latest in monitoring technology and environmental applications.

https://www.fondriest.com/news/temperature.htm


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Monday, November 30, 2020

CONDITIONS REQUIRED FOR LIFE TO EXIST - While scientists can pretty confidently assert those things might be necessary for life on Earth, we should remember that we're basing all our assumptions on, well, Earth. We should all think way more outside the box when it comes to wondering about "life" on other planets. What if we're only looking for carbon-based life and thus fail to recognize the cool planet made up of swirling, cognizant gases? It could happen.- Strange as it may seem, there isn't really one standard definition of life. We can't say that life requires something as specific as breathing or growing; there's just too much variety to living things to nail down one specific criterion. What we can do is talk about some things that all living things on Earth share: They're carbon-based; they require water; they use energy. Perhaps most important for survival, they can grow or reproduce in some way. A main requirement is water, which is necessary for many chemical reactions. Liquid water allows for chemicals to be transported or dissolved, so we do need the water to be between 15 and 115 degrees Celsius so it doesn't vaporize or freeze. Energy -- either in light or chemical form -- is also required for life. Both forms fuel the metabolic reactions that allow life to reproduce. Along with energy, we must make sure that any planet has a protective atmosphere that keeps the radiation from a sun out, while still keeping the planet warm.

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Conditions Required For Life To Exist

What conditions are required for life?

While scientists can pretty confidently assert those things might be necessary for life on Earth, we should remember that we're basing all our assumptions on, well, Earth. We should all think way more outside the box when it comes to wondering about "life" on other planets. What if we're only looking for carbon-based life and thus fail to recognize the cool planet made up of swirling, cognizant gases? It could happen.

BY KATE KERSHNER



Strange as it may seem, there isn't really one standard definition of life.

We can't say that life requires something as specific as breathing or growing; there's just too much variety to living things to nail down one specific criterion.

What we can do is talk about some things that all living things on Earth share: They're carbon-based; they require water; they use energy.

Perhaps most important for survival, they can grow or reproduce in some way.

So, is that all scientists and astrobiologists are looking for when searching for signs of life outside the Earth?

Let's take a deeper look at what is required for life to exist.

As we just said, a main requirement is water, which is necessary for many chemical reactions.

Liquid water allows for chemicals to be transported or dissolved, so we do need the water to be between 59 and 239 degrees Fahrenheit (15 and 115 degrees Celsius) so it doesn't vaporize or freeze.

Energy -- either in light or chemical form -- is also required for life.

Both forms fuel the metabolic reactions that allow life to reproduce.

Along with energy, we must make sure that any planet has a protective atmosphere that keeps the radiation from a sun out, while still keeping the planet warm.

Of course, life also needs nutrients that will help sustain it.

The atmosphere of a planet or moon can even provide these.

Methane, for instance, can produce carbohydrates and fats, which might contribute to my mandatory-cheese-and-wine planet.

These systems need to be able to replenish nutrients, which is no problem if your planet has events like volcanic eruptions or weather systems that produce water.

But here's the rub: While scientists can pretty confidently assert those things might be necessary for life on Earth, we should remember that we're basing all our assumptions on, well, Earth.

We can't know for sure if other planets or moons could be harboring a "life" form that doesn't require the same things Earth-bound systems do.

In the meantime, we'll look for the planets with nutrients, energy and water.

Lots More Information

Author's Note: What conditions are required for life to exist?

We should all think way more outside the box when it comes to wondering about "life" on other planets.

What if we're only looking for carbon-based life and thus fail to recognize the cool planet made up of swirling, cognizant gases? It could happen.

https://youtu.be/ru80xefbu7Q

Kate Kershner, Contributing Writer
Kate Kershner has a degree in creative writing from Western Washington University.

https://science.howstuffworks.com/environmental/earth/geophysics/conditions-required-life.htm


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