Environmental Science
How do red and blue light differ?

Red light has a higher intensity.
The wavelength of red light is longer.
Red and blue light have different directions of polarization.
Blue light has a higher speed of propagation.

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Environmental Science
Our seasons are caused by:

The length of the daylight hours
Only (b) and (c) are correct
All of these
The changing distance between the earth and the sun
The angle at which sunlight reaches the earth

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