Which of the following statements is correct with regard to convection currents?

A. Convection currents in magma are caused by color differences.

B. Convection currents in magma drive the movement of tectonic plates.

C. Convection currents in magma are a result of how the magma is formed.

D. Convection currents in magma play a role in the movement of Earth's inner core.

Conduction. When two material are in thermal contact with different temperatures, energy flows from the hottest material to the coldest, in this there is no material movement

Radiation. Due to the absorption of radiant energy between bodies with different temperatures, it does not need physical contact, which is why it is the form of transmission in a vacuum.

Convention. This occurs when a mass of liquid or gas is in contact with another colder mass and the material of the hotter mass moves upward in the cold mass, this form of heat transfer includes the movement of material, it is very important in liquid and gases.

The magna of volcanoes is a quantity of matter in a liquid or plastic state due to the thermal energy of the interior of the earth, when this mass reaches a colder and fissured area, it can rise towards the coldest part, breaking and deritating. the materials in its path.

Let's annotate the different statements

a) True. According to the explanation, the temperature of the magna causes it to rise due to convection currents.

b) False. The cracks are those that help the convection currents, in general the movement of the plates creates cracks

c) False. The movement of the plates is independent of the convection of the magna which is approximately vertical

d) False. The core of the planet is very deep (> 4000 km) and the magna currents reach about 14 to 20 km

In conclusion using the forms of thermal conduction we find that the correct answer is:

a) Convection currents in magma are caused by hot differences.

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