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Activity 1

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You are watching: Why does an ice cube melt when you hold it in your hand?

Try the activity!

Heat: You can execute this activity using a baggie with a handful of ice inside, or just location a cube of ice in your palm. Heat from your hand also will certainly warmth the bottom of the ice creating a tiny puddle of melted water simply prefer a subglacial lake.

Topography: The water as it melts collects in the cup shape in the palm of your hand. Try to move the ice cube amethod from the center of your palm to see if you have the right to get the water to collect on another part of your hand also. Can"t do it? That"s bereason water will collect in low areas. The palm of your hand is just like a lake bed, a depression or low spot in the land surchallenge. Scientists call the form of the Earth"s surface its topography.

Pressure: You need an ice cube, a item of wire and a level surface. Pull down hard on both ends of the wire using pressure to pull the wire with the ice cube. Be patient this takes a minute. See just how the wire provides a groove in the ice. The wire is not cutting the ice, the press you apply is melting the ice just under the surchallenge of the wire. This is prefer the glacial ice pressure pushing dvery own over the lakes.


Lakes & Topography

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Look the ice relaxing in my hand also. The warmth from my hand also is resulting in the ice to melt (Click on the picture to learn how). My hand also acts much favor the warm that is consisted of in the hot facility of the Planet. The ice cube represents an ice sheet. As an ice sheet rests on the surconfront of the continent the ice is warmed by the warmth climbing from the inner of the Earth. Once warmth transfers to the Planet surconfront, the ice sheet acts like a thick insolating blanket holding in the heat. This adds to the melting. Once the water melts it collects in low area in the Earth surchallenge. Go to "Try this activity" and also test some of this yourself.

Pressure

In enhancement to the heat from the center of the Planet, tbelow is pressure being included to the bottom layers of the ice sheet from the huge amount of ice pressing dvery own on optimal of it. The thicker the ice sheet the even more push that is pushing down on the ice at the bottom leading to melting at the bottom of the ice sheet. Why? Because the melting allude of ice drops as soon as the push is raised.

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How does this work? Think of it this means, if you were going to make a snowguy you would begin by rolling scurrently together, pressing together the individual flakes. As the scurrently is pressed together, the push will certainly reduced the melting point of the snow, bring about it to melt together. If this didn"t take place you would need glue to organize your snowmale together!

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That sounds messy!


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You Can Melt Ice!

Let"s check out exactly how a lot pressure you deserve to apply! Try this Pressure task to see if you can melt ice utilizing pressure! The push you will certainly be using is just favor the heavy push being applied from the thick layers of ice that lie on optimal of the Antarctic continent. Once the water develops under the ice it will certainly collect in low locations in the topography to create subglacial lakes.




See more: Without/ Beyond A Shadow Of A Doubt Meaning, A Shadow Of (A) Doubt

This job funded via NSF Antarctic Research Grants #ANT 0632292; ANT 0619457| contact us | internet master