Mercury: Extreme Temperatures and Speedy Orbits | Grade 4-5 Science Passage - Reading Passage with Quiz for Teachers, Parents & Homeschoolers

About this printable Mercury: The Smallest Planet science reading passage, NGSS-aligned (Grades 3-6)

This engaging Grade 4-5 science passage explores Mercury, the closest planet to the Sun. Students will learn about Mercury’s extreme temperature changes, why its days and nights are so different, and how it moves quickly around the Sun. The passage defines key science vocabulary words such as orbit, atmosphere, and rotation, making it easy for students to understand new concepts. Real-world connections help readers see how studying Mercury teaches scientists about our solar system and the importance of space exploration. The passage ends with an interesting science fact, and is fully audio integrated for accessibility. It aligns with NGSS standards and includes a glossary, a Spanish translation, reading comprehension questions, and writing activities to help students deepen their understanding of planetary science. The included AI image prompt can generate a simple, accurate illustration of Mercury.

Written by Workybooks TeamPublished by Workybooks

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Sample passage and quiz from Mercury: The Smallest Planet

Facts About Mercury

"mercury, planet, space, universe, astronomy, mercury, mercury, mercury, mercury, mercury" by TheSpaceway / Pixabay.

Mercury is the closest planet to the Sun in our solar system. It is a small, rocky planet that has some of the most extreme temperatures found anywhere. During the day, the Sun’s heat makes Mercury’s surface very hot, reaching up to 800 degrees Fahrenheit (430 degrees Celsius). At night, the temperature drops to -290 degrees Fahrenheit (-180 degrees Celsius). This is because Mercury has almost no atmosphere to keep heat in or protect it from the cold of space.

Mercury moves around the Sun in an orbit that is shorter than any other planet. It takes only 88 Earth days for Mercury to make one full trip around the Sun. This means a year on Mercury is much shorter than on Earth! But Mercury spins, or rotates, very slowly. It takes about 59 Earth days to turn once. Because of this, one day on Mercury (from sunrise to sunrise) lasts about 176 Earth days.

Without an atmosphere, Mercury’s sky is always black, even during the day. The surface of Mercury is covered with craters, like our Moon, because meteoroids hit the planet and leave marks. Scientists send space probes to study Mercury. These robots help us learn more about the planet’s surface, temperatures, and how planets form. Learning about Mercury helps us understand how planets change and survive in space.

Interesting Fact: A day on Mercury is longer than its year because it spins so slowly while zooming quickly around the Sun!