Demonstrate that repeated investigations may increase the reliability of results.
The student uses scientific methods during laboratory and outdoor investigations.
Data, Statistics: Visionlearning (website) - Detailed information on statistical terminology, the role of statistics in describing variability—and reliability—in data, as well as the relationships between variables. Includes references for further reading and additional learning modules.
3-2-1 Pop! NASA (PDF) - Students learn how Newton’s Laws of Motion impact rocket liftoff by constructing a rocket powered by pressure generated by the reaction of an effervescent antacid tablet in water.
- Supporting Lessons
- Assessment Ideas
- Literature Connections
- Additional Resources
Balloon Car & Marble Ride: ZOOMsci/PBS Kids (PDF) - These simple, fun investigations demonstrate that repeated trials increase the reliability of test results, and that changing a single variable can impact the outcome significantly.
Heart and Lungs: BioEd Online (website) - Students work in pairs to collect data on their heart and breathing rates, and demonstrate that repeated investigations increase the reliability of results.
Elaboration Lessons and Extensions
ZOOMsci: PBS Kids (website) - Choose from numerous featured investigations to engage your students in a wide range of science investigations requiring data interpretation and analysis, and the construction of explanations from observable and inferred evidence.
After completing one or more lessons on this page, make sure that students record their observations and calculations in their science notebooks. Have each student write a paragraph that describes how the results did or did not change as a result of repeating their investigations.
What’s the Plan? Designing Your Experiment. Hyde, Natalie (ISBN-13: 978-0778751540)
Solving Science Questions: A Book About the Scientific Process. Chappell, Rachel M. (ISBN-13: 978-1600445422)
Elementary School Design Packet: NASA eClips (PDF) - Introduction to a formal process for designing and testing a product or experiment to solve a given scientific problem.