Light sources and straight-line travel are the focus of this Grade 4 Science resource for the Light & Sound topic. Students examine where light comes from, how emitted and reflected light differ, and how the straight-line travel of light helps explain what we can see.

Build clear understanding of light

This worksheet moves beyond simply naming light sources. Students compare natural and artificial light sources based on how they produce light, distinguish between light that is emitted by a source and light that is reflected from an object, and use the idea that light travels in straight lines to predict visibility and beam paths.

The questions also give students opportunities to apply these ideas in different ways, helping teachers check whether learners can recognize the science concept and use it to explain observations.

What students work through

• Multiple-choice questions focused on light sources, emitted light, reflected light, and straight-line travel.
• True-or-false statements that check key ideas and common distinctions.
• Short-answer responses requiring students to explain scientific thinking.
• A reading passage that places the light concepts in context.
• A matching activity connecting related ideas.
• A cloze passage that reinforces important vocabulary and concepts.
• An essay prompt for extended explanation.
• A “Did You Know?” element that adds supporting science context.

Teacher-ready support

The resource includes a Student Notes & Lesson Summary supplement to support review and reinforce the core learning. A separate Teacher Guide PDF provides Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes, giving teachers practical support for introducing the concepts and addressing areas where students may need clarification.

Ways to use it in a Grade 4 classroom

Use the worksheet during a Light & Sound lesson, as guided or independent practice, for science review, or as an assessment opportunity after teaching light sources and the straight-line movement of light. The varied response formats allow students to demonstrate their thinking through recognition, explanation, reading, matching, completion, and extended writing.

For teachers working within the Ontario science framework, this resource provides focused practice around foundational light concepts while keeping the scientific ideas specific: how sources produce light, how objects are seen through emitted or reflected light, and how straight-line travel affects visibility.