Ch03_Season-temp_107

Ch03_Season-temp_107 - Ch. 3 Seasonal and Daily...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch. 3 Seasonal and Daily Temperatures 3.1 Why Does Earth have Seasons? 3.2 Daily Temperature Variations 3.3 Measurements of Temperature
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Earth’s Revolving Earth revolves around the Sun at thousands of km per hour Distance from sun does not determine the
Background image of page 2
Earth’s Rotation Earth rotates counterclockwise about its axis at hundreds of km per hour. Earth’s axis is tilted at 23.5 degrees.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3.1 Why Does Earth Have Seasons? Seasons are regulated by the amount of solar energy received at the surface , determined by: How slant is light striking the surface How long is the sun shine Also under low angle, sunlight spreads out, passes through more atmosphere, is scattered and absorbed more
Background image of page 4
Solar Angle Effect on Light Intensity
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Why Does Earth Have Seasons?-cont’d Why are summer days longer than winter days? Why is the noon sun higher in the sky in summer? Due to the 23.5° tilt of Earth’s axis with respect to the normal of orbital plane. Axis is always pointing in the same direction NH is tilted toward sun in summer and away from sun in winter If Earth were not tilted – noonday sun always overhead at Equator (nowhere else) 12 hrs daylight, 12 hrs darkness at every latitude, every day
Background image of page 6
Graphical Summary of Seasons
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
N.H. Winter is S.H. Summer
Background image of page 8
Solstice is when sun is at its greatest distance from equator. Summer solstice (June 21) – beginning of summer, longest day in N.H. Sun is at 23.5 o N, Tropics of Cancer. Sun does not set north of 66.5 o N. Winter solstice (December 22) – beginning of winter, shortest day in N.H. Sun is at 23.5 o S, tropics of Capricorn. Sun doest not set south of 66.5 o S. Summer and Winter Solstice
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/17/2012 for the course UNDERSTAND 212 taught by Professor Qi during the Spring '12 term at Saint Louis.

Page1 / 33

Ch03_Season-temp_107 - Ch. 3 Seasonal and Daily...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online