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Investigation 3
Investigation 3
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Phase 1 – Defined Understanding
Student Guide
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Access Teacher Guide
Student Guide with answers
Teacher PreLab
Prepare for the Experiment
Phase 2 – Dynamic Understanding
► Investigation Three Summary – Lab Goals
In Investigation Three, you explored the relationship between light and the color of transparent substances. During this Investigation, you:
1. Used a spectrophotometer to determine the absorbance spectra from 400nm to 700nm using three colored water solutions in red, green, and blue. 2. Tested the absorbance and reflection of opaque objects using red, green, and blue filters.
► Investigation Three Summary – Learning Goals
Through these experiments, you concluded that:
1. The color of a transparent object or medium is determined by the wavelength or wavelengths of light it transmits. We perceive the object or medium as being a particular color because those wavelengths are the ones detected by our eyes. For an opaque object, the color we perceive is determined by the wavelengths of light reflected by the object’s surface. Both transparent and opaque objects absorb all wavelengths of light not transmitted or reflected.
Concept Slides
Launch and Discuss
Mathematics Concepts in This Investigation
- (in)direct relationships
- patterns/trends
- ordinal numbers
- sequential order
- data table
- data analysis
- volume in mL
- counting whole numbers
- wavelength in nanometers
- decimals to the nearest tenth, hundredth, thousandth
- continuum/spectrum
- line graph
- skip counting by 0.2 and 50