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Test Questions
Geology 103 with Deane at University of Tennessee - Knoxville
About this deck
By: Kristin Wise
Created: 2010-02-03
Size: 30 flashcards
Views: 165
Created: 2010-02-03
Size: 30 flashcards
Views: 165
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What is NOT part of the scientific mehtod?
opinion and faith
how old is Earth?
4.5 billion years old
by approximately the year 1800, how many people were on Earth?
one billion
how much of the worlds pollution do we produce?
25%
how much of the worlds energy do we consume?
25%
by 2050, what population is the US projected to reach?
397 million
what's the three distinct phases that all species go through?
Growth, stability, and decline
what was the dodo bird?
(Raphus cucullatus) was a flightless bird endemic to the Indian Ocean island of Mauritius. It stood about a meter tall (40 in) weighed about 20 kilograms (44 pounds) lived on fruit and nested on the ground
what percentage of all Earth water is available as fresh, uncontaminated drinking water?
.0015%
what are the two fundamental processes found in all communities?
energy flow and matter cycling
what percentage of energy is lost between each layer as you go up the pyramid for energy flow?
80-95%
what is the current accepted argument about how a solar system forms in cosmogony?
nebular hypthesis
what is the composition of the planets?
rocks, gases and ice
how long ago was there life on Earth?
3.5 billion years ago
Taiga
also called coniferous or boreal forests, occur in a broad belt in northern portions of North America, Asia and Europe.
where is the largest continuous taiga forest on Earth?
Russia
What is the riparian zone?
an area along a river or stream bank consisting of cattails, reeds, willow and other plants that tolerate high moisture. these reduces the effects of flooding & absorbs a lot of water
what is the average rate of extinction per decade? per day?
per decade: 5%, per day: 50 species
what two main reasons make habitat fragmentation especially disruptive?
island effect: the remaining areas of habitat are seperated from each other to form "islands"
edge effect: edges suffer from the effects of sun, wind, temperature changes and intruders
what is true about zebra mussels?
all of the above
the loss of what tree is the worse ecological disaster to ever happen in the US?
the American chestnut tree
what percentage of all trees in the eastern forest were American chestnuts?
25%
what killed three billion American chestnuts within a few decades?
blight: an Asian bark fungus
how many species have been estimated to live on Earth since the first inception of life 3.5 billion years ago?
about two billion; therefore, about 99% of all species are now extinct
during the tunguska event, how many trees were knocked down in a radial pattern directly below the explosion?
80 million
geologists have confirmed how many meteorite impacts on earth?
185
Geologists have suspected how many meteorite impacts on earth?
655
what caused the KT mass extinction?
in 1991, the 170 kilometer (100 mile) diameter Chicxulub crater in Yucatan, Mexico.
KT= Cretaceous-Tertiary mass extinction
an asteroid or comet with a diameter of over ______kilometers (___miles) hits the earth at an average of ______ years
5 kilometers/3 miles
ten million years
About this deck
By: Kristin Wise
Created: 2010-02-03
Size: 30 flashcards
Views: 165
Created: 2010-02-03
Size: 30 flashcards
Views: 165
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis
Dennis