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Lecture 9

NATS 1880 Lecture Notes - Lecture 9: Global Cooling

Natural Science
Course Code
NATS 1880
Richard Gasparini

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Doppler Effect
The apparent change in wavelength of a wave as experienced by an
observer that arises from the relative motion of the source of the wave with
respect to the receiver
Chapter 4: Habitability of Earth
Planets: orbit the sun, has sufficient mass to be spherical in shape, it has
cleared its planetary orbit of other objects
The seasons result from the fact that Earth is tilted 23.5 degrees on its axis
We also turn on our axis once every 24 hours producing 1 day. This means
for most of the Earth is a period light, period of dark
Moon influences tides with its gravity
Moon may also provide some protection from asteroid impacts
Geology is the study of the Earth and the processes which shape our
Earth has changed over time, geology often means the study of other
planetary surfaces
Volcanoes important because they allow material to escape from Earth’s
interior. Includes water vapour and CO2
Volcanoes replenish atmosphere
Volcanoes throw large amounts of ash and dust into atmosphere. Ash can
be spread throughout globe. Blocks OZONE layer and adds to global