Does heat rise or cold rise?
Answer:
Heat rises - thinnk of a hot air balloon on a cold day.
Heat rises.
When the heat decreases the cold rises...
and when the cold decreases the heat rises.
Hot air rises because it is in expanded form and therefore less dense.
Fun fact! You might also want to know that water works similarly. Hot water rises and cold water sinks, but there's an exception. Water is most dense at 4 degrees celsius, so water colder than 4 degrees celsius rises just like warmer water.
Hot AIR rises. Heat itself is transferred by conduction, convection, or radiation.
Heat is a form of energy moves from high temperature to low to temperature zone by way of conduction /r convection / radiation . When one layer of air or liquid is heated , its density lowers and it moves to upper layer and its earlier postion is replaced by a colder air or liquid .
coldness is the absence of heat! thats a scientific principle in thermodynamics.
thermomiter measures the heat level.
so does heat rises yes.. does cold rise no, heat falls...
i still wonder why people would say "set the airconditioner to high" when they mean "make it colder"
:))
Heat rises..
This is due to the phenomenon called global warming..
What is global warming?
The average surface temperature on earth was 58 degrees F in 2003. That's about 1 degree F higher than it was 100 years ago. Since accurate record keeping began in 1880, dont know exactly what date is, the hottest year in history was 1998. the nine hottest years have all been since1990's. This gradual rise is what we call the global warming. On that much, scientists agree. where they can't agree is on the cause. some think it is part of natural cycle of warming and cooling. But mosts scientists believe that increased gases in the air play a big role.
the greenhouse effect is a natural process, needed for life to exist on Earth. certain gaeses in the atmospghere act like glass walls of greenhouse: they let the rays of the sun pass through to the earth's surface but hold some of the heat that radiates from the sun-warmed earth. These naturally occuring greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without these gases, earth's average temperature would be 60 degrees F and colder and we couldn't live here.
Human activity is putting more of these gases into the air. As cities have grown in size and population, people have needed more and more electricity, cars, and manufactured things of all kinds. As industries have grown , more greenhouses have been produced by burning fossil fuels such as oil, coal, and natural gas. The increases in this gases make greenhouse glass thicker, causing more heat to be trapped than in the past.
It doesn't seem like much, but a slight warming could cauyse changes in the climate of many regions. If the climate changed enough, the pklants and the animals that normally live here could no longer survive. Many scientists think average temperatures could rise as much as 6 degrees F over the next 100 years. this warming could cause a lot of ice near the North and South poles to melt, making more water go inmto the oceans. Many areas along the coast wold be flooded.
Heat from the sun is mostly trapped in the atmosphere.
Carbon dioxide, other gases from cars and factories trap extra heat that's why it's starting to heat all over the world!!
Let's look over this crisis.. I hope the government would give projects focusing these matters...
Peace out!
It depends on the substance. It is all to do with density. In air, hot air rises, and cold air sinks. For water it works similarly, except that solid water (ice) is less dense than liquid water so any water that is 4 degrees (least dense temp) or colder will rise, and steam will rise. The liquid water between steam and 4 degrees, hot water rises and cold water sinks. Its the same for many many other substances (hot rises, cold sinks).
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