Environmental Science
Bell-shaped polygonal pyramid indicates

low percentage of old individuals
high percentage of young individuals
moderate percentage of young individuals
low percentage of young individuals

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Environmental Science
Our seasons are caused by:

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

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Environmental Science
The lag in daily temperature refers to the time lag between the:

Time of maximum solar radiation and the time of maximum temperature
Minimum and maximum solar energy received at the surface for a given day
Time of minimum temperature and the time of maximum solar radiation
Minimum and maximum temperature for a day
Sunrise and sunset

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