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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.
Basketball net material is made of what?
high dense polymer fabric
What makes an object float rather than sink?
In general ... -- Density = mass divided by volume. -- If the object is less dense than the fluid surrounding it, it will float. -- If it's more dense than the fluid surrounding it, it will sink. This way of looking at it applies equally well to fish, battleships, birds, hot-air balloons, and air masses with different temperatures and densities.
Can a solid be less dense than a liquid?
Yes, there are many. For example, anything that floats on water is less dense than liquid water. A number of solids are less dense than liquids. The most common example is ice. Ice (frozen water) is less dense than its liquid counterpart for some very specific reasons. Many other solids are less dense than liquids, as well. Using water as the liquid, you'll find that cork, wood (most kinds) and styrofoam will all float on it. As the liquid becomes more dense, the range of items that will float on it increases. Mercury, for example, is a liquid metal at room temperature. Because it is so dense, many things will float on it. Lead is one example of something that will float on liquid mercury. For a question about substances that are less dense in their solid form than those same substances in their liquid form, use the link below to the related question.
Why substances have different melting points?
just because accept it ok!
What substances is less dense than air?
Plasma.
What happens to the temperature and the density of the the material?
When the material gets closer to the core it gets hotter and more dense.
What is the name given to the process whereby a material is made less dense?
Rarefaction
Do convection currents form in the mantle when heated materials become more dense?
Actually, heated materials are less dense. When heat is applied to a substance such as liquid, it becomes less dense. It is this less dense and heated material that rises because it weighs less. The part of the mantle that is more dense would be any substance that is cooling and is sinking down.
Why will more dense water remain at the bottom of the cup?
The force of gravity acts to pull as much mass as possible to the lowest location possible; this happens when the denser substances or objects sink, and the less dense substances or objects rise, making room for the denser ones.
Why does the material in the asthenosphere rise as it is heated?
The material in the asthenosphere rises when heated because of its reduced density. As it absorbs heat, the material becomes less dense compared to the cooler surrounding rocks. This buoyant force causes the heated material to rise towards the surface.
When light passes from less dense material to more dense material the light?
bends towards the normal.
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.
When convection takes place in the mantle why does rock material sink and warm rock material rise?
This happens with all liquids which have varied heat through out it, in fact even in the air. This happens because when objects get hotter, they vibrate more, and thus take up more space. This means that the same mass takes up more space, meaning that the substance becomes less dense. Therefore, the hotter rock rises above the cooler rock because it vibrates more, so takes up less space, so is less dense. From there, denser substances fall to the bottom because the heavier objects can push the lighter substances out of the way, which in this case, is upwards.
Why Does cooler material in the asthenosphere rises towards the lithosphere?
Cooler material in the asthenosphere rises towards the lithosphere because of its higher density compared to the surrounding warmer material. As it rises, it displaces the less dense material above it, creating convection currents that contribute to plate movement and tectonic activity.
When convection takes place in the mantle why does cool rock materiel sink and warm rock material rise?
This happens with all liquids which have varied heat through out it, in fact even in the air. This happens because when objects get hotter, they vibrate more, and thus take up more space. This means that the same mass takes up more space, meaning that the substance becomes less dense. Therefore, the hotter rock rises above the cooler rock because it vibrates more, so takes up less space, so is less dense. From there, denser substances fall to the bottom because the heavier objects can push the lighter substances out of the way, which in this case, is upwards.
Is magma less dense then the surrounding rock?
yes
