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KnovaKNOVA — A free reading app with curriculum-aligned passages on History & Science for Grades 3-8

Why Do We See Rainbows — Reading Comprehension

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Grades
  • 3
  • 4
  • 5
Standards
  • NGSS PS4.B
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About This Reader

This engaging 250-word reading passage introduces fourth-grade students to the science behind rainbow formation, aligned with NGSS standard PS4.B. Students discover how sunlight interacts with water droplets in the air through refraction and reflection. The passage explains that each droplet acts like a tiny prism, bending and separating white light into its component colors: red, orange, yellow, green, blue, indigo, and violet. Written at an appropriate reading level for Grade 4, the text uses clear, accessible language to explain complex concepts like refraction and the visible spectrum. The passage includes bolded key vocabulary terms with immediate definitions to support comprehension. Students learn why rainbows appear when the sun is behind them and rain is in front of them. This audio-integrated resource includes a simplified differentiated version for struggling readers, Spanish translations of both versions, a comprehensive glossary, multiple-choice questions testing recall and application, writing activities, and graphic organizers. The materials support hands-on investigations and classroom discussions about light and its properties, building foundational understanding of physical science concepts essential for elementary learners.

Perfect For:

👩‍🏫 Teachers
  • • Reading comprehension practice
  • • Auto-graded assessments
  • • Literacy skill development
👨‍👩‍👧‍👦 Parents
  • • Reading practice at home
  • • Comprehension improvement
  • • Educational reading time
🏠 Homeschoolers
  • • Reading curriculum support
  • • Independent reading practice
  • • Progress monitoring

Reading Features:

📖
Reading Passage
Engaging fiction or nonfiction text
Comprehension Quiz
Auto-graded questions
📊
Instant Feedback
Immediate results and scoring
📄
Printable Version
Download for offline reading
🔊
Read Aloud
Voice-over with word highlighting

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