PWC 1.5.1
SOL 1.6 The student will investigate and understand basic relationships between the sun and the Earth.
 
 

Key Concepts include:

The sun as a source of heat and light
Night and Day 

Critical Attributes:
The sun is the source of light for the Earth.  The heat from the sun warms the Earth's land, water, and air.

The tilt of the Earth on its axis relative to the sun causes the seasons.

The daily change from day to night is caused by the rotation, or turning, of the Earth.  At any given time, half of the Earth is in daylight, facing the sun, while the other half is in darkness, facing away from the sun.  It takes the Earth about 24 hours to turn completely around (make one complete rotation), so the length of one day is 24 hours.

Day and night follow each other over and over again in acycle as the Earth continues to turn or rotate.