What is the science behind convection?
Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving. Convection happens when there is a difference in temperature between two parts of a liquid or gas. The hot part of a fluid rises, and the cooler part sinks.
What are the convection currents in Earth?
Convection currents are the movement of fluid as a result of differential heating or convection. In the case of the Earth, convection currents refer to the motion of molten rock in the mantle as radioactive decay heats up magma, causing it to rise and driving the global-scale flow of magma.
What happens in a convection current?
convection currents occur when a heated fluid expands, becoming less dense, and rises. The fluid then cools and contracts, becoming more dense, and sinks.
What is convection current physics?
A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer.
What is a convection current in geography?
Convection currents, that occur within the molten rock in the mantle, act like a conveyor belt for the plates. Tectonic plates move in different directions. The friction between the convection current and the crust causes the tectonic plate to move. The liquid rock then sinks back towards the core as it cools.
Which statement best describes convection current?
The best description of a convection current is that e. it is the process in which warm material expands and rises while cool material contracts and…
What are air convection currents?
The circulation of air in the earth’s atmosphere is driven by convection. Near the equator of the earth, the sun heats the air which becomes less dense and rises upwards. It cools down as it rises and becomes less dense than the air that is around, spreading out and descending again towards the equator.
What is convection current in geography?
What is the Julius Sumner Miller Fellowship?
In 1993, the Australian Science Foundation for Physics established the Julius Sumner Miller Fellowship in his memory. The fellowship is currently held by Karl Kruszelnicki, best known as “Doctor Karl” for his appearances on Australian radio and television as a science commentator and author.
Is Julius Sumner Miller married?
Julius Sumner Miller was born on May 17, 1909 in Billerica, Massachusetts, USA. He was an actor and writer, known for The Hilarious House of Frightenstein (1971), Why Is It So? (1963) and The Mickey Mouse Club (1955). He was married to Alice Brown. He died on April 14, 1987 in San Jose, California, USA.
Who is Julius Miller?
Julius Sumner Miller (May 17, 1909 – April 14, 1987) was an American physicist and television personality. He is best known for his work on children’s television programs in North America and Australia.
What energy is spent by the moving hammer?
by the moving hammer is spent in splitting the wood and raising the temperature of the nail and the wood. Friction always produces heat. of my moving vocal cords. 4 – Thermal energy communicated to a kernel ,of corn makes it “pop” .