Last week and this one we're taking about the role of density in our world, and our universe! We mentioned density in the formation and structure of solar systems, galaxies, and even the expansion of the universe. What are some other areas of our world/universe that we can see the affects or structure of density?
Rylee Hickman
10/11/2011 04:03:59 pm
One area of our world that we can see the affects of density is in ocean water. These affects occur because of the changes in temperature and salinity. Increase in salinity increases the density of the seawater. Density variations in the ocean are mostly because of the temperature changes in the seawater. As water density increases the temperature of the water decreases. We can see the affects in our world because the varying densities cause the water to move which end up froming a density current.
Mr. Casey
10/12/2011 08:42:46 am
Rylee says that the temperature of water decreases as salinity (salt content causing higher density) increases. Can anyone think of a situation where the density of materials actually causes an increase in temperature? ...think back to class.
Hannah Pulley
10/12/2011 11:27:22 am
Another way we can see density happening in our world is through clouds. When a cloud is over water such as a lake or the ocean, it gains mass which increases the density. This happens because clouds absorb the moisture from the body of water below it. When the cloud gets to full it will release the moisture know as precipitation or rain. Therefore, it releases weight or its mass. Which results in a lower density.
Mr. Casey
10/13/2011 06:35:30 am
Hannah, I agree that clouds can change density by water content, but let's not forget that we could also have a change in volume which would affect the density. ...it's not just about the "junk", it's also about the "trunk". 10/17/2011 07:46:41 am
so is that the same as snow? Cause snow is less dense then water....well i guess it depends what type of snow for Ex: Light snow fall slowly plumits to earth and heavy snow well you get the idea but what im talkging about is light snow fall it slowely glides down so is water deneser or less denser then snow?
Mr. Casey
10/17/2011 08:10:34 am
Good point Bryce! Do you think there are factors other than density that may play a role in how fast a snow flakes falls?
Lothar
10/19/2011 01:54:33 am
Hey Mr.Casey, this is kind of related to what Rylee said about the ocean water. I found out that the sea water is more dense than regular water and lake water, because the salt that's in the ocean makes it A LOT more dense.
Cole Daniel
10/19/2011 04:18:16 am
About what you said with any stituation that makes the temperature rise I couldnt think of any but i do know that some densitys decreas as their temperature rises
Joshua Espinosa
10/19/2011 04:55:36 am
Well, in other areas in our universe or galaxy we can find a lot of density in nebulas. I say this because it has gas and dust and other stars forming. The areas with the most density in nebulas are where when it's forming stars. Nebulas, I think, are the areas to find density in our universe.
Russell Sandoval
10/19/2011 02:19:12 pm
Comment
Trevor Scherbaum
10/20/2011 01:48:36 pm
In the center of the event horizon in black holes is the singularity. A singularity is somthing that no mathimatical formula can explian, and the singularity has an infinate amount of mass and density. So stars and space debris can get sucked in and the singularity will never be filled.
Andrew Leber
10/20/2011 03:09:48 pm
DENSITY is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume.
ismael
10/20/2011 03:16:28 pm
omg i fouded. well now that we found this thing i shoul tell you about the dencety in the unevers. it pretty dance!! and he is a good articoolhttp://www.universetoday.com/36573/density-of-the-universe/
frank yakou
10/20/2011 04:27:18 pm
Did u know that the earths density is 5.513 g/cm3
leonardo avila
10/21/2011 12:51:04 am
I was watching tv two nights ago a a scientist said that he researched outer space. What he studied was that he studied a star which included water and ice in it. he said, "that's how we get rain in Earth.
hayley Hawkins
10/21/2011 02:04:04 am
I read an article on water densities in the ocean. The article said that water in the ocean is more dense than regular fresh water because of the salt in it. The less dense water will float on top layer of the water, the warmer water will float on top of the colder water because it is less dense.
brandon a williams
10/21/2011 04:05:43 am
DENSITY REPRESENTS OUR UNIVERSE OF ITS MASS, or density of a material is defined as its mass per unit volume. 10/23/2011 01:24:26 pm
The opportunity rover landed on Mars in 2004. It has survived seven years discovering craters,rocks,and clumps of clay that could have evidence of life inside of them.
Dominique Markowicz
10/23/2011 01:58:17 pm
think that filling up a balloon is related to density because when you fill up a balloon with your own oxegyn it will be less dense than filling it up with a machine because there is more carbon dioxide than oxegyn and oxegyn is more dense than carbon dioxide. I think this because when there is a fire in your house, you are supposed to crawl on the floor because there is where more clean oxegyn there.
Wyatt adams
10/24/2011 12:55:23 pm
Another way to show density is our earths layers the Continental crust is the least dense and the Inner core happens to be the most dense because it is solid. The crust is made up of different soils and types of dirt.
Ireland Burleson
11/15/2011 10:34:41 pm
hey Mr.Casey. so i looked up how salt dissolves in water and it said that salt is more dense than water and when the salt concentration is at it's maximum, the salty water becomes saturated, which means that the salt is so concentrated in the water, it cant dissolve any more. Comments are closed.
|
This blog is for you...Feel free to share some curious train of thought you have, as well as share your thoughts on others. Archives
June 2014
Categories |