The sun is higher in the sky and the energy that we receive from the sun is more direct
The sun remains in the sky for a longer period of time
Higher sun & longer days mean –
greater amounts of energy being absorbed by the Earth’s surface
Temperatures must go up
The sun is lower in the sky and its energy distribution is more spread out
The sun is visible for a much shorter time during the day
Lower & fewer hours of sun means –
less energy received/absorbed
Temperatures must go down
The Sun’s Changing Position
The sun is in the sky higher (in elevation) for longer in the summer, SO
It takes longer to rise and set from horizon to horizon and has more time to heat up Earth
What happens when the sun changes positions ?
The sun changes from providing direct to indirect sunlight
Direct during summer • Indirect during winter
What happens to shadows when the sun changes positions ?
Summer: shorter shadows
Sun is higher in the sky
Winter: longer shadows
Sun is lower in the sky
ENERGY AND THE EARTH’S SHAPE : Because the Earth is in the shape of a sphere, there will be parts of the Earth that receive direct energy from the sun and other regions of the world that receive indirect energy. Notice the Earth’s axis in this drawing. The axis is the imaginary line about which the Earth spins. It is straight up and down. If this is how the Earth went around the sun each year, the seasons would always remain the same.
" Solstice "
" sol " from the Latin meaning sun
" sistere, " from the Latin meaning cause to stand still
The longest (summer) or shortest (winter) day of the year
Summer solstice Winter solstice
Summer Solstice (Northern Hemisphere)
The summer solstice is the first day of summer (about the 21st June)
The longest day of the year in the Northern Hemisphere
When the North Pole is leaning more directly toward the sun than it does on any other day
It is the point when the sun shines directly over head of the tropic of Cancer, the northernmost reach.
The winter solstice (20th/21st December) is the first day of winter
The shortest day of the year
The winter solstice in the Northern Hemisphere occurs when the North Pole is leaning away from the sun
It is the point when the sun shines directly over head of the Tropic of Capricorn, the southernmost reach.
When the North Pole is pointing neither directly toward nor directly away from the sun
Equal periods of light and darkness
The halfway mark between summer and winter solstices
March 20 /21
First day of Spring; North pole begins to turn back towards from the sun
September 20 /21
First day of Fall; North pole begins to turn away from the sun
Reviewing what you learned:
Read pages 80-83 in your textbook.
In your notebook, answer the section review questions for section 4.3 #1-3 on page 83, and question #18 on page 87.