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Observe & Measure

The scientific method is reliant on unbiased observation and accurate and repeatable measurement of those observations. In everyday life, observing ,may be simply sitting still to watch and listen. In contrast, observing can be very active in science. Scientists and science students must continually make decisions how best to examine an object or situation. For example, decisions might include whether to touch or smell something in an experiment. Observation alone is not sufficient to evaluate a given experiment. Measuring those observations is also important. A measurement is quantitative because it includes a number. However, a number alone is not a measurement. A measurement must also include a unit. For example, temperature can be measured using several scales.

Lesson 1 (or “Day 1”) Material
Lesson 2 (or “Day 2”) Material
Lesson 3 (or “Day 3”) Material
Lesson 4 (or “Day 4”) Material

6:00 Inferences and observations

3:48 Measurements Biology

5:49 Measuring Volume Using Displacement


Compare Contrast and Debate


Resources Documents and Links

Special Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Analyze and interpret data.
  • Cross-Cutting Concept: Scale, Proportion, and Quantity.

Emphasize HS-LS2-1  Use mathematical and/or computational representations to support explanations of factors that affect carrying capacity of ecosystems at different scales.

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