Investigable questions and design testing are essential to planning reliable scientific investigations and evaluating engineering solutions. This Grade 7 Science worksheet explores how students turn observations into measurable questions, select appropriate investigation methods, follow safety practices, and use evidence to test and improve a design. It addresses the Texas Science 7 topic of Investigations, Evidence and Systems within the TEKS framework.

From a Question to a Testable Plan

Students examine what makes a question investigable: it must focus on something that can be observed or measured. The reading passage introduces descriptive investigations, which record what happens in one situation; comparative investigations, which examine differences between conditions; and experimental investigations, which change one factor while keeping other important conditions consistent.

Examples connect these approaches to familiar science and classroom situations, including observing clouds, comparing ice melting in sunlight and shade, and investigating how far paper airplanes travel. Students consider why an investigation method must match the question, how suitable tools produce useful measurements, and why approved safety practices matter when collecting evidence.

Science Investigation Meets Engineering Design

The resource also introduces engineering design criteria: the requirements a successful solution should meet. Students explore how a design plan identifies a proposed solution, materials, steps, and testing conditions. A paper bridge provides a concrete example of testing whether a design can support a load. Rather than treating testing as a final formality, students consider how the evidence can show whether the solution meets its criteria and where improvements may be needed.

When results are unexpected, investigators may revise a method, repeat a test, or refine the question. This reinforces the distinction between collecting results and using those results to make a reasoned scientific or engineering decision.

What Students Practise

The worksheet includes a reading passage, multiple-choice questions, true-or-false statements, short-answer responses, matching, a fill-in-the-blank paragraph, an extended response, and a Did You Know section. These activities ask students to classify investigation approaches, recognize design criteria, choose useful measurement tools, explain the purpose of testing, and apply sound investigation practices. The extended response asks learners to plan a fair paper-airplane investigation, including the question, method, measurements, tools, safety, and use of evidence to improve the investigation.

Included Teaching Resources

• Student worksheet: Reading and written practice covering investigable questions, investigation methods, safety, evidence, and design testing.
• Separate PDF answer key: Supports checking student responses and reviewing their reasoning.
• Student Notes & Lesson Summary: Provides an additional resource for reviewing the lesson's key concepts.
• Separate Teacher Guide: Includes Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes.

Ways to Use This Resource

Use this Grade 7 science investigation worksheet before a hands-on activity to introduce planning, during a unit on scientific inquiry to reinforce key terms, or afterward to help students reflect on how methods and evidence influence conclusions. The notes support lesson review, while the separate answer key and teacher guide provide resources for checking work and preparing discussion.

By linking measurable questions with fair testing and engineering criteria, this resource gives students a structured way to explain not only what they would investigate, but how they would gather evidence and use it to make better decisions.