hw 15 geol
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California State University, Sacramento *
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7
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Geology
Date
Dec 6, 2023
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Name
Isaac Jamison
Date
11/23/20
Geology 7 (Natural Disasters) – Fall 2020
Homework #15 – Impacts with Space Objects (20 pts.)
Students are expected to complete and submit original work and to
act with integrity in completing all assignments. All work must be
original as this class incorporates individual work, but also
collaborative activities requiring students to actively confer with other
students. A zero (0) grade may be given to all parties for any
duplicated or copied work, no matter what the source. In addition,
academic dishonesty may result in a Course Grade Penalty and/or
referral to the Office of Student Conduct for further disciplinary action.
See Sac State’s Academic Honesty Policy.
1.
True/False. All extraterrestrial impacts on earth have a higher chance of landing on
land rather than in the ocean. (1 pt.)
a.
False
2.
True/False. A surface impact of a small object only a few meters wide would potentially
result in small regional damage and possibly a couple of deaths. (1 pt.)
a. True
3.
Define the term “airburst” in terms of extraterrestrial objects. (2 pts.)
It is basically an explosion in the air
4.
Circle the correct answer(s). The Impact of an asteroid or comet is a direct cause for a
number of natural hazards, including: (1 pt.)
a. subduction zones
b. tsunami———-
c. earthquakes——-
d. wildfires ——-
e. climate change ———
f. volcanic eruptions——-
5.
An asteroid hit the Yucatan Peninsula in Mexico close to 65 million years ago. What
have you learned about this impact, and what are three (3) affects that this impact had on
our planet and the species living on it? (5 pts.)
It caused huge landslides on the seafloor, ripping through any colonies of life. Created a
radiating series of waves, including tsunamis that ramped up and towered over coastlines
6.
True/False. Overall, the risk for death caused by impacts is relatively low. Using
simulation technology, scientists estimate only two (2) people die from impacts a year
in any given hundred year period. (1 pt.)
a.
False
7.
What are some mitigation strategies are in place to minimize the risk of an airburst
hazard? Are we completely helpless in the instance of a large impact event? (3 pts.)
Civil defense—involving such efforts as evacuating the region around a small impact,
Slow-push or -pull methods—gradually changing the orbit of an NEO so that it misses
Earth,Kinetic impact—delivering a large amount of momentum (and energy)
instantaneously to an NEO to change its orbit so that it misses Earth, and Nuclear
detonation—delivering a much larger amount of momentum (and energy) instantaneously
to an NEO to change its orbit so that it misses Earth
8.
Describe how a meteor shower becomes created with regards to comets and Earth’s
atmosphere. (2 pts.)
occur when the earth in its orbit around the Sun passes through debris left over from the
disintegration of comets
9.
What does the term “NEO” stand for and refer to? What does the “NEAT” program for
tracking asteroids have to do with this term? (3 pts.)
A near-Earth object, The Near-Earth Asteroid Tracking (NEAT
)
project
concentrated on
the discovery and observations of near-Earth asteroids and
comets, called (NEO’s)
10.
True/False. According to the average estimated amount of deaths related to impacts over
thousands of years, you are less likely to die from an impact than a car accident or by
drowning. (1 pt.)
a. True
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