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Lecture

PSY397 – Chapter 3

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Department
Psychology
Course
PSY397H1
Professor
Martin Ralph
Semester
Fall

Description
PSY397Chapter 3two groups of clocks o physical clocks o biological clocksearth rotates every 23hrs 56mins o in elliptical pattern o reason for lag is that not only is the earth rotating but it is also revolving around the sunthe rotation of the earth changes about 1degree with every rotationthis is called the sidereal dayour clocks focus on the solar dayTHE YEARprovides t8ime cues through photoperiodism o caused by earthly movementsa fixed tilt of 235 degrees and the elliptical pattern of rotation account for the seasonsTHE MONTHtidal rythms are controlled by the moon o revolves around the earth every 2725 days sidereal monthdue to the rotation of the earth around the sun the duration from one moon phase to the next is about 295 days lunar monthCLOCKS AND CALENDARS ANCIENT TIMESancient people had to predict when it was safest to get food
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