Solar Cycle and Sunspots Quiz

What are sunspots?

• Regions with higher temperature and density

• Large, dark features caused by increased magnetic activity

• Red features rising above the eclipsed Sun

• Bright features on the surface of the Sun

Answer explanation

Sunspots are large, dark features on the surface of the Sun caused by increased magnetic activity.

Why do sunspots look darker than their surroundings?

• They are hotter at about 5800 K

• They have higher temperature and density

• They are colder at about 3800 K

• They have stronger magnetic fields

Answer explanation

Sunspots appear darker than their surroundings because they are colder at about 3800 K.

What did Galileo demonstrate about the Sun in 1612?

• The Sun has a rotation period of approximately 28 days

• The Sun has a rotation period of approximately 25 days

• The Sun has a rotation period of approximately 1 month

• The Sun does not rotate on its axis

Answer explanation

Galileo demonstrated that the Sun has a rotation period of approximately 1 month.

What is the average interval between successive sunspot maxima?

• 9 years

• 11 years

• 14 years

• 36 days

Answer explanation

The average interval between successive sunspot maxima is 11 years, which is the correct choice.

How is the solar magnetic field measured?

• Using the rotation speed of the Sun

• Using the number of sunspots

• Using the Zeeman effect in the spectra of the light from sunspot regions

• Using the temperature of the Sun

Answer explanation

The solar magnetic field is measured using the Zeeman effect in the spectra of the light from sunspot regions.

Tags

NGSS.HS-PS2-5

What are the bright regions in the chromosphere around sunspots known as?

• Prominences

• Differential rotation

• Magnetism

• Plages

Answer explanation

The bright regions in the chromosphere around sunspots are known as plages. These regions indicate increased magnetic activity.

What is the primary cause of sunspots?

• Increased solar radiation

• Increased solar wind

• Increased solar magnetic activity

• Increased solar temperature

Answer explanation

Sunspots are primarily caused by increased solar magnetic activity.

What is the term for the cycle of sunspot activity?

• Solar Cycle

• Sunspot Cycle

• Magnetic Cycle

• Rotation Cycle

Answer explanation

The term for the cycle of sunspot activity is the Solar Cycle. It refers to the periodic variation in the number and intensity of sunspots on the Sun's surface.

What is the effect of sunspots on Earth's climate?

• They cause global warming

• They have no effect

• They cause global cooling

• They cause increased rainfall

Answer explanation

Sunspots have a warming effect on Earth's climate.

Tags

NGSS.HS-ESS2-4

What is the name of the phenomenon that causes the number of sunspots to increase and decrease over time?

• Solar Flare

• Solar Cycle

• Solar Wind

• Solar Radiation

Answer explanation

The phenomenon that causes the number of sunspots to increase and decrease over time is called the Solar Cycle. It is a natural cycle of approximately 11 years.