how-water-breaks-down-rocks - Reading Passage with Quiz for Teachers, Parents & Homeschoolers

About this printable How Water Breaks Down Rocks science reading passage, NGSS-aligned (Grades 3-6)

This engaging passage, aligned to NGSS science standards, explains how water breaks down rocks through processes like weathering and erosion. Students will learn about key concepts such as mechanical and chemical weathering, and how these processes shape landscapes and form soil. The passage includes bolded vocabulary terms with definitions in a glossary, real-world examples, and an interesting science fact. Activities include a multiple-choice quiz and writing prompts to help students understand and apply the concepts. The content is designed for grade 4-5 students with appropriate reading level and language, plus a full Spanish translation for bilingual classrooms. Audio integration supports diverse learners. This resource helps teachers meet science standards while making earth science exciting and accessible for all students.

Written by Workybooks TeamPublished by Workybooks

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Sample passage and quiz from How Water Breaks Down Rocks

How Water Breaks Down Rocks

Water over rocks (53660450826) — Over time, water can slowly break down even the hardest rocks on Earth. Image by BLMUtah
Wikimedia Commons

Weathering is the process that breaks down rocks into smaller pieces. Water is one of the most powerful forces for weathering rocks. Understanding how water breaks down rocks helps us know why mountains get smaller over time and how soil forms.

Water seeps into tiny cracks in rocks. When the temperature drops below freezing, the water turns to ice and expands, which means it takes up more space. The ice pushes the crack open wider. When it warms up, the ice melts back into water and seeps deeper into the crack. This process is called the freeze-thaw cycle. Over many freeze-thaw cycles, the crack grows larger and larger until the rock splits apart. Think of it like opening a zipper—each cycle pulls the rock apart a little more.

Water also breaks down rocks in another way. Rainwater slowly dissolves certain minerals in rock, which means it breaks them down and carries them away bit by bit. Minerals are the natural materials that make up rocks. Rivers and ocean waves also weather rocks by constantly flowing over them and wearing them away.

Both freezing and dissolving take a very long time—sometimes thousands of years—but they are always working to change Earth's surface.

Interesting Fact: The Grand Canyon was carved mainly by the Colorado River wearing away rock over millions of years. The river is still weathering and eroding the canyon today!