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

Q3:

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

  • AThe 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.
  • 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 hot, dense region of the Sun where nuclear fusion occurs.
  • DThe 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.
  • EThe chromosphere of the Sun is a region of the Sun where most of the light that we receive on Earth is emitted.

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

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 where most of the light that we receive on Earth is emitted.
  • DThe core of a Sun is the region of the Sun that emits a distinctive red color of light.
  • EThe core of a Sun is the hot, dense region of the Sun where nuclear fusion occurs.

Q6:

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

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

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

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 core
  • DThe photosphere
  • EThe radiative zone

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

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

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

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

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

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

Q9:

The diagram shows the internal structure of the Sun.

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

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

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

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

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

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

Q10:

The diagram shows the internal structure of the Sun.

In which part of the Sun does nuclear fusion occur?

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

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

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

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