Environmental Science
Our seasons are caused by:

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

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Environmental Science
During the winter solstice in the Northern Hemisphere:

At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
Astronomical winter begins in the Northern Hemisphere
The noon sun is overhead at 23.5o S latitude
All of these

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