SOLAR SYSTEM

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UNIVERSE

THE SUN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Although scientists are unable to explore the Sun’s layers directly with instruments, they can measure the change in the speeds of the surface layers and the temperature of those layers from Earth. Using this data, scientists have created models of the Sun and we now know that the sunspots that form on the surface are the areas of coolest temperature for this star. At the sunspots, temperatures are merely 3700 Kelvin (K). What does this indirect information about the Sun confirm?
A
The Sun has a structure similar to Earth’s structure.
B
Storms form on the surface of the Sun, similar to the atmosphere of Earth.
C
The Sun’s photosphere has properties of a solid, similar to the crust of Earth.
D
Convection occurs in parts of the Sun, similar to convection in the mantle of Earth.
Explanation: 

Detailed explanation-1: -Scientists use models of the Sun to better understand how it works. The currently accepted model of the Sun indicates that it has a dense core surrounded by different layers. How is energy transferred from the core of the Sun to its outer layers? Energy radiates outward from the core as visible light.

Detailed explanation-2: -Professional astronomy They can examine the Sun in different wavelengths of light to see its surface and corona. They can use spectroscopy to see the elements produced in different parts of the Sun. They can study its radiation using radar, or its interior using techniques such as acoustic interferometry.

Detailed explanation-3: -Surveying sunspots is the most basic of ways we study how solar activity rises and falls over time, and it’s the basis of how we track the solar cycle. Sunspots correspond with the Sun’s natural 11-year cycle, in which the Sun shifts from relatively calm to stormy.

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