- Read the textbook assignments, list questions you have about
the reading, and ask them during class time.
NOTE: go to the following to see the viewgraph on
Evolution of Earth's Atmosphere.
There is also a listing of composition of different types of objects in our solar system, such as the Sun, Jupiter, and Rocky Planets.
- For an interesting discussion of the contribution
of methane gas to global warming, go to the following
website: (short & easy)
the past 30 years, the Sun's irradiance has varied +- 1 part in 1367, or +-
0.07%: this is not responsible
for the global climate change observed during the last
- The best layman's explanation
I've seen for the appearance of the ozone hole over the Antarctic is at the
following University of Cambridge website:
- See the following links for the mounting circumstantial evidence for the causes
of the "great dying" 250 million years ago, when most ocean- and land-based
Extremely comprehensive, well-organized site about all aspects of Mars exploration. Good
links to other sites also.
- For Mars aficionados, here's
an article from the NY Times about
getting to Mars.
Before you sign up for a trip to Mars, you might want to look into this
research, which is investigating the effects of cosmic radiation on brain
neurons and living tissue in general. The dose to Skylab 4 astronauts mentioned
in the article is higher than the allowed annual dose for nuclear plant
workers. Also, the mean lethal dose (one-time exposure) is about 600 rem - 50%
of people with that one-time dose will die, rapidly and extremely miserably.
For a good introduction to the concept of magnetic fields, go to the
following website - it contains good sketches as well as clear
- Here is a link to and article on the reported claim
that finding DNA in dinosaur bones proves that the dinosaur remains could not be
at least 65 million years old, as claimed by scientists using age-dating
methods. The second of the two references carefully examines the peer-reviewed
articles of the reputed discoverer and compares those findings with the
interpretation of a well-known creationist.
is an interesting page describing what we know (from several linked methods)
about the long-term history of Earth's temperature.
- Respond with written answers to the
unit 9 discussion questions.
I'll take questions about these during class time.
your responses by comparing with my
unit 9 DQ responses
on this web-site, as instructed on my responses page. Turn these in the following Monday.
- Print out the unit 9 quiz
and circle your answer choice for each question. I'll take questions about the quiz via e-mail. Turn these in the following Monday.