Worksheet: The Structure of the Sun

In this worksheet, we will practice describing the internal structure of the Sun.

Q1:

Which of the following is the correct description of the photosphere of the Sun?

  • AThe photosphere of the Sun is a hot, dense region of the Sun where nuclear fusion occurs.
  • BThe photosphere of the Sun is a region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.
  • CThe photosphere of the Sun is a region of the Sun that emits a distinctive red color of light.
  • DThe photosphere of the Sun is a region of the Sun where energy is transferred outward by radiation but no energy is produced through nuclear fusion.
  • EThe photosphere of the Sun is a region of the Sun where most of the light that we receive on Earth is emitted.

Q2:

Which of the following is the correct description of the radiative zone of the Sun?

  • AThe radiative zone of the Sun is a region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.
  • BThe radiative zone of the Sun is a region of the Sun where most of the light that we receive on Earth is emitted.
  • CThe radiative zone of the Sun is a region of the Sun where energy is transferred outward by radiation but no energy is produced through nuclear fusion.
  • DThe radiative zone of the Sun is a hot, dense region of the Sun where nuclear fusion occurs.
  • EThe radiative zone of the Sun is a region of the Sun that emits a distinctive red color of light.

Q3:

Which of the following is the correct description of the chromosphere of the Sun?

  • AThe chromosphere of the Sun is a hot, dense region of the Sun where nuclear fusion occurs.
  • BThe chromosphere of the Sun is a region of the Sun that emits a distinctive red color of light.
  • CThe chromosphere of the Sun is a region of the Sun where most of the light that we receive on Earth is emitted.
  • DThe chromosphere of the Sun is a region of the Sun where energy is transferred outward by radiation but no energy is produced through nuclear fusion.
  • EThe chromosphere of the Sun is a region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.

Q4:

The core of the Sun is in a self-correcting equilibrium. If fusion reactions in the core slow down, less energy is released, and the core cools down, causing the core to and the density to , which would then the fusion rate. If fusion reactions in the core speed up, more energy is released, and the core heats up, causing the core to and the density to , which would then the fusion rate.

  • Aexpand, decrease, decrease, shrink, increase, increase
  • Bshrink, increase, increase, expand, decrease, decrease
  • Cshrink, decrease, decrease, expand, increase, increase
  • Dexpand, increase, increase, shrink, decrease, decrease

Q5:

Which of the following is the correct description of the core of the Sun?

  • AThe core of a Sun is the region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.
  • BThe core of a Sun is the region of the Sun where energy is transferred outward by radiation but no energy is produced through nuclear fusion.
  • CThe core of a Sun is the region of the Sun that emits a distinctive red color of light.
  • DThe core of a Sun is the hot, dense region of the Sun where nuclear fusion occurs.
  • EThe core of a Sun is the region of the Sun where most of the light that we receive on Earth is emitted.

Q6:

Which of the following is the correct description of the corona of the Sun?

  • AIt is a hot, dense region of the Sun where nuclear fusion occurs.
  • BIt is a very low-density region around the Sun but one that has the highest temperature of any part of the Sun.
  • CIt is a region of the Sun that emits a distinctive red color of light.
  • DIt is a region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.
  • EIt is a region of the Sun where most of the light that we receive on Earth is emitted.

Q7:

Which of the following is the correct description of the convective zone of the Sun?

  • AThe convective zone of the Sun is a region of the Sun where most of the light that we receive on Earth is emitted.
  • BThe convective zone of the Sun is a hot, dense region of the Sun where nuclear fusion occurs.
  • CThe convective zone of the Sun is a region of the Sun that emits a distinctive red color of light.
  • DThe convective zone of the Sun is a region of the Sun where energy is transferred outward by convection but no energy is produced through nuclear fusion.
  • EThe convective zone of the Sun is a region of the Sun where energy is transferred outward by radiation but no energy is produced through nuclear fusion.

Q8:

The diagram shows the internal structure of the Sun.

Which of the parts of the Sun shown in the diagram has the highest temperature?

  • AThe chromosphere
  • BThe convective zone
  • CThe photosphere
  • DThe core
  • EThe radiative zone

Which of the parts of the Sun shown in the diagram has the highest pressure?

  • AThe convective zone
  • BThe chromosphere
  • CThe radiative zone
  • DThe core
  • EThe photosphere

Which of the parts of the Sun shown in the diagram has the lowest temperature?

  • AThe photosphere
  • BThe radiative zone
  • CThe core
  • DThe chromosphere
  • EThe convective zone

Which of the parts of the Sun shown in the diagram has the lowest pressure?

  • AThe photosphere
  • BThe chromosphere
  • CThe convective zone
  • DThe core
  • EThe radiative zone

Q9:

The diagram shows the internal structure of the Sun.

What name is given to the region marked I in the diagram?

  • AThe corona
  • BThe convective zone/the convection layer
  • CThe thermosphere
  • DThe radiative zone/the radiation layer
  • EThe photosphere

What name is given to the region marked II in the diagram?

  • AThe photosphere
  • BThe convective zone/the convection layer
  • CThe thermosphere
  • DThe corona
  • EThe radiative zone/the radiation layer

What name is given to the region marked III in the diagram?

  • AThe radiative zone/the radiation layer
  • BThe convective zone/the convection layer
  • CThe ionosphere
  • DThe corona
  • EThe photosphere

Q10:

The diagram shows the internal structure of the Sun.

In which part of the Sun does nuclear fusion occur?

  • AThe convective zone
  • BThe chromosphere
  • CThe radiative zone
  • DThe photosphere
  • EThe core

Which part of the Sun produces most of the light that we receive on Earth?

  • AThe photosphere
  • BThe core
  • CThe chromosphere
  • DThe radiative zone
  • EThe convective zone

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