Clipping is a handy way to collect and organize the most important slides from a presentation. Take black and white pictures of an assortment of colored construction paper to determine which colorsappear to have similar and dissimilar degrees of brightness and shade.2.
Cover two jars with different colored construction paper that share a similar shade when photographedwith black and white film.


The dog needs color vision to distinguishbetween the two jars, since with complete color blindnessthe two colors would appear to be the sameshade.5. Rods process visual information in dim light and are sensitive motion detectors, while cones handle color and detail.
Cover the third jar with another color whose photograph shade is distinctlydifferent from the other two jars.


Even though yellow andviolet appear to be similar shades in black and white photos, the dogswere able to choose the correct yellow jar 72% of the trials.This data supports our hypothesis,that dogs can see some shades of color.

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