Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Science Exam Sem. 2

How do nitrates usually enter groundwater Through fertilizers on crops.
Where is most of earths water supply usually found. In the oceans.
What is the theory of plate tectonics . The lithosphere is broken into several plates that move about as a result of convective motion in the asthenosphere.
Divergent boundary. Areas of crustal formation (opposite direction).
Convergent boundary . Regions of plate collusion and great mountain building and plate subduction (same direction).
Transform fault. 2 plates that slide horizontally past each other. :)
Continental divide- Who ontinuous line running north to south down the length of north America, seperated the Pacific basin on the west from the Atlantic basin on the east. Water west= pacific, east=Atlantic
Who is the founder of the Continental drift theory? Alfred Wagner.
What is the diffrence between "soft" water and "hard" water? "soft"- soap suds dont form readily in "hard" water...
What is it called when a glacier is growing. advancin
Precambrian Era makes up 85% of Earth's history crustal plates began to form in this era
Paleozoic Era Most coal deposits formed life moved to land during Silurian period Organisms w/ hard parts appeared sea level rose and fell :0
Mesozoic Era "time of the dinosaur" break up of Pangea began
Cenezoic San Andres fault created "age of mammals"
How was Earth during the precambrian time The beginning was a time of lots of volcanic activity and frequent meteorite impact. It was an oceanless planet covered w/ countless volcanoes, huge holes and gashes. All continents were devoid of life.
What is the accepted hypothesis for the great dinosaur extinction Extinction was caused by the impact of a very large metorite. The concentration of iridium in a meteorite is higher than the iridium in Earth's crust. The Crectaceuos- Tertiary layer depositted about 65 million. Time of the dinosaur extinction.
How was the San Andres fault created? Created during the Cenezoic era Same tectonic activity created the Gulf of CA by the collision of the westward moving NA plate and the Pacific Ridge
What type of cloud is a tornado formed from: Large cummulonibus
What percent of the earths atmosphere is made of nitrogen, oxygen, and argon N- 78% O2-21% Ar-.9%
What gasses were the first atmosphere probably made of? Helium and Hydrogen
What states make up Tornado Alley Texas, Oklahoma, Kansas, Missouri
What are the five layers of the atmosphere and what occurs in each 5-Exosphere- above 500km, thinning atmosphere yelids to radiation belt 4-Thermosphere- very thin, where shuttle orbits, ionosphere (rich ion layer where auroras occur 3-Mesosphere-rock fragments burn 2-Strat.- contains ozone, planes fly here
Troposphere Thin layer, contains 90% of atmospheres mass, weather occurs here, tempertures go up and down
The core of the moon is... solid
How old is the sun about 5.5 billion years old
What plant's mass is most like Earth's Venus
What is the predominant gas in the Earth's atmosphere Nitrogen
What is the predominant gas in Venus' atmosphere CO2
What is the predominant gas in Mars' atmosphere CO2
What planet is most like the sun Jupiter
What is a black hole The remains of a giant collapsed star
What is a pulsar a spinning nuetron star
Where do rockets work best in space
Who was the first to propose space exploration by rocket Konstantin Tsiolkovsky
Who was the dutch proffesor that built steam propelled model cars Willem Gravesnade
What % of a rocket's total mass is propellant 91%
Who is the American scientist that published the pamphlet, A method of reaching extreme altitudes, and is considered the father of rocketry Roberth H. Goddard
Who is the scientist that published a book about outer space rocket travel which led to the formation of rocket societies. Hermen Oberth
What is the name of Sir. Issacc Newtons book Philosiphae Naturalis Principae Mathmatica
What rocket was used in WWII against London V-2
Name Newton's three laws of motion 1- An object at motion or at rest will stay in motion or at rest until acted on by an outside force 2- f=ma 3- for every action there is an equal and oposite reaction
Groundwater subsurface water in the zone of saturaration
Glacier a LARGE mass of ice formed by the compaction and recrystalization of snow, moving downslope under its own weight
Hydrologic Cycle The natural circulation of water from ocean to atmosphere to ground back to ocean
Leachate A solution formed by water that has percolated through soil containing water soluble subtances
Accumulation The ammount of snow added to a glacier in a year
Porosity The volume of open space in a rock or sediment compared to the total volume of solids plus open space
Permeability The ability of a material to transmit fluid
Ablation the amount of snow a glacier looses in a year
Water table the upper boundary of the zone of saturation, below which every pore space is filled with water
Alfred Wagner Earth scientist who hypothesized that the Earht;s continents moved in slow but constant motion
H.H Hess Geologist who proposed that the seafloor is constantly being renewed. New lithosphere is created at spreading centers and old lithosphere is destroyed at subduction zones
Pangea A single large landmass that exsisted in the geologic past and was composed of all present day continents.
Created by: Maggiehooks