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What Are Sunspots

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Format: Interactive (Online), Printable (PDF)
Grades: 5678
Subjects: scienceela
Standards: MS-ESS1-1
Languages: English, Spanish

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Reading passage

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Adapted for varied levels

Spanish translation

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About this reader

science,ela

Written by Workybooks TeamPublished by Workybooks

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Sample passage and quiz content

CONTENT PREVIEW

This image shows extreme ultraviolet light that highlights the hot solar material in the sun's atmosphere.Giant Sunspot Erupts on October 24, 2014" / NASA (Public domain).

Sunspots are cooler, darker patches that appear on the Sun's surface. Scientists explain that these dark areas form where intense magnetic fields push through the photosphere, which is the visible layer of the Sun. These powerful magnetic fields slow the flow of heat rising from deeper inside the Sun. As a result, sunspots become cooler than the surrounding areas.

Sunspots may look completely dark, but they still glow extremely hot. Evidence shows that a typical sunspot has a temperature around 6,500°F. The surrounding photosphere burns much hotter at about 10,000°F. Sunspots appear dark only by comparison to the brighter areas around them. If you could see a sunspot by itself, it would shine brightly.

Scientists observe that the number of sunspots changes in a predictable pattern. The solar cycle lasts approximately 11 years from start to finish. During solar maximum, the Sun can display dozens or even hundreds of sunspots at once. During solar minimum, the Sun may show very few sunspots or none at all. This cycle signals changes in the Sun's magnetic activity.

The solar cycle affects Earth in important ways. When sunspot numbers increase, the Sun releases more solar flares and coronal mass ejections. These powerful bursts of energy and particles can reach Earth. They may disrupt satellites, radio communications, and power grids. They also create beautiful auroras near Earth's poles. In 1859, a massive solar storm called the Carrington Event caused telegraph systems to fail across North America and Europe. Scientists study sunspots to predict when similar events might occur.

Understanding sunspots helps scientists learn how the Sun works and how it influences Earth. By tracking the solar cycle, researchers can better prepare for space weather events. This knowledge protects technology that modern society depends on every day.

Interesting Fact: Some sunspots grow larger than Earth itself. The largest sunspot ever recorded stretched more than 80,000 miles across!

What causes sunspots to form on the Sun's surface?

Intense magnetic fields that slow the flow of heatCold spots where the Sun has no energyAreas where the Sun is burning outShadows cast by planets passing near the Sun

What is the approximate temperature of a typical sunspot?

1,000°F6,500°F10,000°F15,000°F

How long does one complete solar cycle last?

About 5 yearsAbout 11 yearsAbout 20 yearsAbout 50 years

What does the term 'photosphere' mean in the passage?

The center core of the SunThe magnetic field around the SunThe visible surface layer of the SunThe atmosphere surrounding Earth

What does 'solar maximum' refer to in the context of sunspot activity?

When the Sun is hottestWhen the Sun has the most sunspotsWhen the Sun is closest to EarthWhen the Sun produces no energy

Based on the passage, why do sunspots appear dark?

They are completely cold with no lightThey are covered by dark cloudsThey are cooler and less bright than surrounding areasThey face away from Earth

What can happen on Earth when the number of sunspots increases?

Earth's orbit changesSatellites and power grids may be disruptedThe Moon becomes brighterOcean tides stop completely

How might understanding the solar cycle help scientists protect modern technology?

By predicting when solar storms might affect EarthBy changing the Sun's magnetic fieldBy stopping sunspots from formingBy making satellites immune to all damage

Sunspots are actually completely dark areas with no light or heat.

TrueFalse

The Carrington Event in 1859 was caused by a massive solar storm that disrupted telegraph systems.

TrueFalse

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This engaging 400-500 word reading passage introduces middle school students to sunspots—coolerdarker patches on the Sun's surface caused by intense magnetic fields. Students learn that sunspots appear dark only by comparisonstill glowing at around 6500°F. The passage explains the 11-year sunspot cycle and its connection to solar activity that affects Earth. Aligned to NGSS standard MS-ESS1-1 and Disciplinary Core Idea MS-ESS1.Athis resource helps students understand Earth's place in the universe and the Sun's influence on our planet. The passage includes audio integration for enhanced accessibilityscientific vocabulary development with 8-10 glossary termsand real-world examples. Supplementary activities include multiple-choice questionswriting promptsand graphic organizers to deepen comprehension and apply scientific concepts.