Question

Below is a diagram of the Sun. Bettina wants to place a circular arrow in one layer of the diagram to illustrate how energy is transferred in that layer.

In which layer should Bettina draw the arrow?

W
X
Y
Z

Answer 1

Hello! Your answer is W.

The layer W is called the convection zone. The lower bit of this zone is hotter (as it is closer to the core) and the outer is cooler. Since heat rises, liquid will rise in this zone, and then cool down, and sink again. This causes a circular transfer of energy.

Y and Z both transfer heat outwards - they are the radiative zone and the inner zone, respectively.

Hope this helps!

Answer 2

Option (1)

Step-by-step explanation:

The energy is transferred from layer W due to the convection currents. It is the outermost layer of the interior of the sun having a thickness of about 200,000 km. The temperature at its bottom is supper extreme, about 2,000,000° C.

These convection currents are generated because of the heat radiated from the core of the sun. Due to heat radiated by the core of the sun, the less dense materials rises up and gets cooled. This becomes dense and sinks again towards the core. This continuous motion forms a convection current in that region. As a result of which it allows the heat energy to transfer from the inner core to the outer regions.

Hence, the correct answer is option (1).