Planning investigations becomes more concrete when students work through realistic science scenarios involving testable questions, variables, and fair tests. This Grade 6 Science worksheet gives students focused practice with the early stages of designing a scientific investigation.

Build Investigation-Planning Skills

Students first distinguish questions that can be investigated by changing or comparing a factor and collecting evidence. They then turn an observation about melting ice into a testable question, helping connect scientific curiosity with an investigation that can actually be carried out.

The resource also introduces the key parts of an investigation through a bean-plant scenario. Students identify what is being changed, what is observed or measured, and what should remain the same. This provides direct practice with variables and controlled conditions before students evaluate complete investigation plans.

From Fair Test to Investigation Plan

Students examine examples involving paper airplanes, plants, and toy cars and decide whether each investigation is fair or unfair. They must look for situations where more than one factor changes, rather than simply memorizing a definition of a fair test.

A final investigation-planning scenario asks students to select the strongest plan for testing whether the amount of water affects how quickly a sponge becomes full. Students choose the best controlled comparison and explain why it provides a fair test. This moves the practice from identifying features to applying them in a new situation.

What You Receive

• ✔️ Student worksheet focused on planning a scientific investigation
• ✔️ Testable-question identification and question-writing practice
• ✔️ Investigation-parts table for identifying changed, measured, and controlled factors
• ✔️ Fair-versus-unfair investigation scenarios
• ✔️ Investigation-plan selection with written justification
• ✔️ Complete answer key with explanations and an acceptable example for the open-ended question

Classroom Uses

Use this science practice as an introduction to investigation design, guided practice after teaching variables and fair testing, independent classwork, review, or a quick formative assessment. The scenarios are familiar enough for students to focus on the scientific reasoning rather than complicated equipment or procedures.

The answer key supports efficient checking while preserving room for reasonable student responses to the open-ended testable-question task. Because the activities move from recognizing testable questions to identifying investigation parts and evaluating fair-test plans, the worksheet provides a clear progression toward independent investigation planning.