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Which of the following is the complex ion that forms the basic building block of all silicate minerals?
Which of the following is not a scientific impossibility portrayed as?
Rocks that are naturally magnetic
A release of methane hydrates or clathrates (same thing) would lower global temperatures by reflecting incoming sunlight? T/F
During the last 800,000 years, northern hemisphere glaciations have occurred about how often?
Every 100,000 years
Faster plate spreading rates at mid-ocean ridges are a likely cause of higher sea level in the past? T/F
Mean annual temperature in the northern hemisphere has increased by about how much in the last century?
One can discern the direction of longshore drift by examining the amount of sand on the two sides of a jetty or groin? T/F
The Atlantic Ocean off of the east coast of the US has high salinity because evaporation significantly exceeds precipitation there? T/F
The little ice age, a period of cold temperatures in N. America and Europe, occurred about how long ago?
4000 years ago
The superstorms in The Day After Tomorrow are (think about the direction of vertical airflow; is it up or down?) high or low pressure?
high pressure cells
The Younger Dryas, a period of cold climate that followed deglaciation in the northern hemisphere occurred about
10,000 years ago
When the volume of ice in ice caps increases, the ratio of oxygen 18 to oxygen 16 in the oceans increases? T/F
What has an effect on global temperature?
Volcanoes, output of the sun, ocean circulation, orbital variations
Which of the following is not a means of removing dissolved content from ocean water?
What are potential sources of sand to a beach?
Dune erosion, stream discharge, longshore drift, onshore drift
In the movie Volcano magma/lava killed many people in what ways?
Volcanic bomb, melted by lava, gas emission burns
In the movie Volcano, which of the following volcano phenomena occurs
Ash fall, lava stream, gas emissions, volcanic bombs
Volcanic island chains in the Pacific are arrayed in lines. This is because they represent magma leaking through long cracks in the crust? T/F
The last time Earth's magnetic field reverse polarity was closest to how many years ago?
1,000,000 years ago
Relative to sediment near the top of an accumulation, sediment near the base was...?
A landslide on the seafloor could trigger a large tsunami as depicted in the movie Tidal Wave? T/F
There is no strong evidence that the amount of water on Earth's surface has changed dramatically in the last 100 Ma? T/F
How does average grain size tend to decrease with distance downstream?
Abrasion and Selective sorting
The discharge of a stream during flood stage increases very rapidly with increasing recurrence interval? T/F
A rocket launched along a path following the equator would appear to travel what way?
Neither north nor south
The water in Earth's oceans was significant less saline in the distant geological past than today? T/F
The main characters in Ice Age 2 are mammals that co-existed when?
The Pleistocene (2 Ma to 10,000 years ago)
A fault that cuts both a fold and an igneous intrusion proves the intrusion is older than the fault? T/F
The diversity of life as measured by the number of species and/or genera on Earth has been continuously and steadily increasing through the last 500 Ma? T/F
The radiometric age (age estimated by dating using radioactive isotopes) of a rock isn't affected by metamorphism? T/F
What are stromatolites?
A laminated, rock-like structure built over geologic time by microorganisms such as cyanobacteria
What is the half-life of a radioactive isotope?
The time it takes for half of the original amount to decay
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