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Why Venus Is So Hot

Interactive passage with audio narration, comprehension questions, and printable PDF.

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Format: Interactive (Online), Printable (PDF)
Grades: 5678
Subjects: scienceela
Standards: MS-ESS1-3
Languages: English, Spanish

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Reading passage

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Comprehension quiz

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Glossary & flashcards

Vocabulary practice

Differentiated version

Adapted for varied levels

Spanish translation

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About this reader

This 400-500 word informational science passage for grades 6-8 explores the question 'Why Is Venus So Hot?' Students learn how Venus's thick carbon dioxide atmosphere creates a runaway greenhouse effect that traps incoming solar heat, resulting in surface temperatures of approximately 465°C. The passage demonstrates that distance from the Sun is not the only factor determining planetary temperature, as Venus is actually hotter than Mercury despite being farther from the Sun. Aligned with NGSS standards MS-ESS1.B and MS-ESS1-3, this passage helps students trace cause-and-effect relationships in Earth and space science. The content includes audio integration, vocabulary development with 8-10 key science terms, Spanish translation, differentiated versions for English Language Learners, comprehension questions, writing activities, and graphic organizers. Students explore concepts including atmospheric composition, thermal radiation, heat trapping, and planetary characteristics while developing scientific reasoning skills.

Written by Workybooks TeamPublished by Workybooks

Sample passage and quiz content

CONTENT PREVIEW

"Surface Warmth on a Venus Volcano" / NASA

Venus is the hottest planet in our solar system. Surface temperatures on Venus reach about 465°C, which is hot enough to melt lead. This might seem surprising because Mercury is closer to the Sun. However, distance from the Sun is not the only factor that determines a planet's temperature. Venus's extreme heat comes from its thick atmosphere, which creates a powerful greenhouse effect.

The atmosphere of Venus is made up of about 96% carbon dioxide. This gas acts like a thick blanket around the planet. When sunlight reaches Venus, it passes through the atmosphere and warms the surface. The surface then releases heat as thermal radiation. Normally, this heat would escape back into space. On Venus, however, the carbon dioxide traps the heat and prevents it from leaving. Scientists explain that this process creates a runaway greenhouse effect. The trapped heat keeps building up over time, making the planet hotter and hotter.

Evidence shows that Venus was not always this hot. Scientists believe that Venus may have once had oceans like Earth. Over millions of years, however, volcanic activity released massive amounts of carbon dioxide into the atmosphere. As more carbon dioxide accumulated, more heat became trapped. This created a cycle where rising temperatures caused more water to evaporate, which trapped even more heat. Eventually, all the water disappeared, leaving behind the scorching planet we observe today.

Mercury, the closest planet to the Sun, has temperatures that can reach 430°C on its sunny side. However, Mercury has almost no atmosphere to trap heat. At night, Mercury's temperature drops to about -180°C. Venus, on the other hand, stays at 465°C both day and night because its thick atmosphere holds the heat constantly. This comparison demonstrates how atmospheric composition affects planetary temperature more than distance from the Sun alone.

Understanding Venus helps scientists learn about climate change on Earth. Earth's atmosphere also contains carbon dioxide, though in much smaller amounts. When humans burn fossil fuels, they release more carbon dioxide into Earth's atmosphere. This increases the greenhouse effect on our planet. By studying Venus's extreme greenhouse effect, scientists can better predict how rising carbon dioxide levels might affect Earth's climate in the future.

Interesting Fact: The atmospheric pressure on Venus is 92 times greater than Earth's, which is similar to the pressure you would feel 900 meters deep in Earth's oceans.

What is the approximate surface temperature of Venus?

430°C465°C180°C92°C

What percentage of Venus's atmosphere is made up of carbon dioxide?

50%75%96%100%

What does the term 'thermal radiation' mean in the context of the passage?

Sunlight that reaches a planet's surfaceHeat energy released from a warm surfaceThe temperature of the atmosphereCarbon dioxide in the air

What does 'greenhouse effect' refer to in this passage?

The process of growing plants in greenhousesThe way sunlight heats a planet's surfaceThe process by which gases trap heat in an atmosphereThe release of gases from volcanoes

Why is Venus hotter than Mercury even though Mercury is closer to the Sun?

Venus receives more sunlight than MercuryVenus has a thick atmosphere that traps heat while Mercury does notMercury's surface reflects all sunlight back into spaceVenus is actually closer to the Sun than Mercury

Based on the passage, what can scientists learn by studying Venus?

How to create more carbon dioxide on EarthHow to travel faster through spaceHow rising carbon dioxide levels might affect Earth's climateHow to make Earth's atmosphere thicker

What caused Venus to lose its oceans over millions of years?

Asteroids hit the planet and removed all the waterVolcanic activity released carbon dioxide, which trapped heat and caused water to evaporateThe Sun pulled all the water away from VenusVenus moved farther from the Sun and froze all its water

How does Mercury's temperature change between day and night?

It stays the same at 465°CIt drops from 430°C to about -180°CIt increases from -180°C to 465°CIt remains constant at 0°C

True or False: Distance from the Sun is the only factor that determines a planet's temperature.

TrueFalse

True or False: Venus stays at approximately the same temperature both day and night.

TrueFalse