Solar Cycle

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.

What are the bright cloud like regions that surround 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.

The dark areas of sunspots are ______ than the surrounding matter.

• more active

• hotter

• less active

• cooler

Answer explanation

Sunspots are cooler than the surrounding matter on the Sun's surface.

The following are possible effects of energy and radiation from solar flares and coronal mass ejections, except _________________.

• Harm astronauts in space

• Create blackouts on Earth

• Colourful Auroras

• Global Warming

What is the name of the region in the Sun where sunspots typically occur?

• Photosphere

• Chromosphere

• Corona

• Core

Answer explanation

Sunspots typically occur in the Photosphere, the region of the Sun's surface where they are most visible.

What is the typical lifespan of a sunspot?

• A few years

• A few days

• A few months

Answer explanation

Sunspots typically have a lifespan of a few days, making 'A few days' the correct choice.

What is the average duration of a solar cycle?

• 9 years

• 11 years

• 14 years

• 36 days

What are the bright cloud-like regions that surround sunspots known as?

• Prominences

• Differential rotation

• Magnetism

• Plages

What is the primary cause of sunspots?

• Increased solar radiation

• Increased solar wind

• Increased solar magnetic activity

• Increased solar temperature