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Density is a measure of how much mass is contained in a give unit volume (density=mass/volume). It is usually expressed in kg/m^3. Put simply, if mass is a measure of how much 'stuff' there is in an object, density is a measure of how tightly that 'stuff' is packed together.
One of the ways we can see density illustrated in everyday life is by looking at whether things float or sink in a liquid (water, for example). If an object is less dense than the liquid it is placed in, it will float. If it is more dense, it will sink. This is why an anchor, which is very dense (lots of mass in a relatively small volume) sinks very quickly, while an inner tube (not much mass in a relatively large volume) floats and is very difficult to push underwater.
Some elements are naturally found in very dense forms,and one of the most surprising cases of a less dense object floating on a denser liquid occurs when objects are put in a container of liquid mercury (Hg). This element is a metal that is liquid at room temperature, and it is VERY dense. In fact, it is denser than lead, and metal objects like forks, coins, or even a cannonball will float on top of it!
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoIn general I would guess the top one, but more information in the question would greatly improve the accuracy of an answer.
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Do plates become more dense or less dense when they become cooler?
Cooler material is more dense and hotter material is less. This means that plates become more dense as they cool.
Liquid magma flow upward through the crust because it is less dence than the solid material around it?
less dense than the solid material around it
Why is water located above the earths crust but below the air?
Because it is less dense than the material that makes up the earth's crust, but more dense than the material that makes up the air.
Which term refers to the ridged layer of Earth that is about 100 km thick and generally less dense than the material below it?
The Lithosphere is the ridged layer of Earth that is about 100 km think and generally less dense than the material below it. This layer is the tectonic plates the move along on the anthesphere.
What element is less dense selenium or oxygen?
Oxygen is less dense.
Do plates become more dense or less dense when they become cooler?
Cooler material is more dense and hotter material is less. This means that plates become more dense as they cool.
Do convection currents form in the mantle when heated materials become more dense?
Yes, convection currents form in the mantle due to the heating and cooling of material, which causes density differences and drives the movement of material. When material in the mantle is heated, it becomes less dense and rises, while cooler, denser material sinks, creating a circulation pattern known as mantle convection.
How dense is the continental crust?
less dense than the material of the Earth's mantle
Why does a less dense material float in a more dense material?
density is mass per unit volume so the less mass per cubic(what ever measure) the less buoyant.
Is it true molten material in the asthenosphere rises in convection currents because heated materials become more dense?
Actually, hot, less dense material rises, and cold, denser material sinks. Denser material will be heavier (per unit volume) and gravity therefore pulls it down. Less dense material has buoyancy and rises. It's very logical.
What arrangement of material may lead to convective motion?
denser material on top of less dense material
What is the hot less dense material below earth?
Magma?
Liquid magma flow upward through the crust because it is less dence than the solid material around it?
less dense than the solid material around it
Is liquid magma less dense or more dense?
Liquid magma is more dense than the solid material around it.
What happens to substances that are less dense than the surrounding material?
There are a number of things that may happen to substances that are less dense than the surrounding material. In most cases, this is what will cause them to float on the surrounding material.
What can you infer about the density of a material if a sample of it floats in water?
it is less dense.
Heat transfer in fluids due to less dense material rising?
Convection.
