Structure and Function of The Sun

The Sun is made up of six different layers. Which is the innermost layer?

• Chromosphere

• Convective Zone

• Corona

• Core

Why is nuclear fusion possible in the core of stars but not in the outer layers?

• Nuclear fusion does occur in the outer layers

• The high temperatures an pressure for nuclear fusion to occur can only happen in the core of stars

• Hydrogen and Helium nuclei require more light to bond together

• Hydrogen only exists in the core of stars

Which of the following describes the process of nuclear fusion?

• Atomic nuclei combine to form a larger nucleus

• Gas atoms lose electrons to form smaller atoms

• Helium is fused to form carbon

• Atomic nuclei are split to form two atoms

Why is the Sun's rotation 35 days long at the poles but only 25 days long at the equator?

• Nuclear fusion

• Convection currents

• Differential rotation

• Radiation

Which 2 of the following elements are found in the Sun and are involved in the process of nuclear fusion

• Carbon

• Hydrogen

• Helium

• Neon

Which element makes up more than 70% of the Sun

• Hydrogen

• Helium

• Nitrogen

• Oxygen

In the process of convection, what happens to gases as they cool?

• They evaporate into the atmosphere

• They sink back down to lower convection zones

• They burst and create sunspots

• They begin the process of nuclear fusion

Which of the following are characteristics of stars? (Select all that apply)

• Stars are gaseous

• Stars are generally larger than planets

• Stars are fueled by nuclear reactions

• Stars are at the center of all Solar Systems

In the following diagram, which layer of the Sun is represented by the number 1?

• Core

• Photosphere

• Chromosphere

• Corona

In the following diagram, which layer of the Sun is represented by the number 2?

• Core

• Photosphere

• Chromosphere

• Corona