How do you explain why air rises as it is heated?
Substances that have internal movement(gas, liquid, and solids to a certain degree) will have convection currents. The concept is most easily understood in a gas. As gases are heated their molecules travels faster and faster. The faster they move and the more the kinetic energy involved in the collisions causes the gas to increase in volume. This means that the particles are further apart and therefore the density of the gas decreases. And substances with lower density will rise. This can also be thought of as kinetic and potential energies. As the gas is heated the molecules inside have increased kinetic energy. The increased energy of the molecules allows the molecule to reach higher potential energy levels(which means the molecule can rise).
jacquie s has a science test tomorow Hope that helps.
Cool Air! As the heated air rises the heated air starts getting cool. This is because the higher the air is the colder it gets. Then the heated air will be replaced with cold air. As the cold air then comes down near the ground the cool air will become heated because of the sun. Heated Air - Cool Air - Cold Air And On And On It Goes
What is the name of the gas that is filled in hot air balloons to make them soar and rise up in the sky?
Wind can be caused by either pressure or temperature differences. From there you get into which is cause and which is effect. Wind starts when you have heated air rising and cooler air flowing in to take its place. As the lighter heated air rises, the cooler, heavier air will rush in to take its place. Once the heated air cools in the upper atmosphere, it then falls back.
The heat from the filament radiates in all directions inside the bulb (as there is no air for convection). Once the heat reaches the glass the heat is now transmitted by both radiation and convection. Hot air rises so the air on the side of the bulb is heated and it rises up, it is now replaced by cooler air which needs to be heated. So the air on the side of the bulb is…
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Like any other gas, air expands when it is heated. As the heat rises and the air spreads out, pressure decreases. this because pressure is the amount of force exerted on a specific area. Therefore, as gas spreads, it pushes less and over a larger area. so.... when heated by the sun, air pressure would technically decrease
convection currents an example is a heat radiator...it radiates heat which warms the air. the air rises as its heated and cooler air takes its place then being heated by the radiator...this continues until the room is heated and so is a pot is on a stove and the water is boiling and the cold water is at the top and it goes to the bottom
When the Earth surface is heated by the sun, the AIR above the surface is also warm. The warm air rises, and when it rises it cools down. Then it condenses and form clouds. And then it rains. (If the air rises very quickly cumulonimbus clouds can form) So the simple answer, Convectional Rainfall: Water forces to rise by heat.
What are the mechanisms for heat transfer in the atmosphere and where in the atmosphere is each important?
The main mechanism for heat transfer in the atmosphere is known as convection. This is when a heated object transfers some heat to the air, which transfers that heat to a colder area. This phenomena is observed on the earth, although before I explain about that, you have to know that "hot goes to cold" (it's a basic physics fact). Land and air along the equator are heated. The land transfers some heat to the…
During the day the earth is heated by the sun. The earth then heats the air, and the heated air rises. As the air heated air rises, cold air from the ocean travels in to take its place, resulting in on-shore winds. At night the earth cools down, making the ocean warmer than the earth and the process is reversed, creating off-shore winds. Cold air is clumped together looking for spots to spread out. That…