Science Exam Sem. 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How do nitrates usually enter groundwater | Through fertilizers on crops.
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| Where is most of earths water supply usually found. | In the oceans.
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| 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.
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| Divergent boundary. | Areas of crustal formation (opposite direction).
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| Convergent boundary . | Regions of plate collusion and great mountain building and plate subduction (same direction).
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| Transform fault. | 2 plates that slide horizontally past each other. :)
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| 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
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| Who is the founder of the Continental drift theory? | Alfred Wagner.
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| What is the diffrence between "soft" water and "hard" water? | "soft"- soap suds dont form readily in "hard" water...
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| What is it called when a glacier is growing. | advancin
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| Precambrian Era | makes up 85% of Earth's history
crustal plates began to form in this era
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| Paleozoic Era | Most coal deposits formed
life moved to land during Silurian period
Organisms w/ hard parts appeared
sea level rose and fell :0
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| Mesozoic Era | "time of the dinosaur"
break up of Pangea began
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| Cenezoic | San Andres fault created
"age of mammals"
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| 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.
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| 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.
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| 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
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| What type of cloud is a tornado formed from: | Large cummulonibus
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| What percent of the earths atmosphere is made of nitrogen, oxygen, and argon | N- 78% O2-21% Ar-.9%
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| What gasses were the first atmosphere probably made of? | Helium and Hydrogen
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| What states make up Tornado Alley | Texas, Oklahoma, Kansas, Missouri
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| 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
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| Troposphere | Thin layer, contains 90% of atmospheres mass, weather occurs here, tempertures go up and down
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| The core of the moon is... | solid
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| How old is the sun | about 5.5 billion years old
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| What plant's mass is most like Earth's | Venus
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| What is the predominant gas in the Earth's atmosphere | Nitrogen
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| What is the predominant gas in Venus' atmosphere | CO2
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| What is the predominant gas in Mars' atmosphere | CO2
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| What planet is most like the sun | Jupiter
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| What is a black hole | The remains of a giant collapsed star
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| What is a pulsar | a spinning nuetron star
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| Where do rockets work best | in space
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| Who was the first to propose space exploration by rocket | Konstantin Tsiolkovsky
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| Who was the dutch proffesor that built steam propelled model cars | Willem Gravesnade
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| What % of a rocket's total mass is propellant | 91%
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| 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
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| Who is the scientist that published a book about outer space rocket travel which led to the formation of rocket societies. | Hermen Oberth
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| What is the name of Sir. Issacc Newtons book | Philosiphae Naturalis Principae Mathmatica
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| What rocket was used in WWII against London | V-2
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| 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
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| Groundwater | subsurface water in the zone of saturaration
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| Glacier | a LARGE mass of ice formed by the compaction and recrystalization of snow, moving downslope under its own weight
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| Hydrologic Cycle | The natural circulation of water from ocean to atmosphere to ground back to ocean
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| Leachate | A solution formed by water that has percolated through soil containing water soluble subtances
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| Accumulation | The ammount of snow added to a glacier in a year
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| Porosity | The volume of open space in a rock or sediment compared to the total volume of solids plus open space
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| Permeability | The ability of a material to transmit fluid
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| Ablation | the amount of snow a glacier looses in a year
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| Water table | the upper boundary of the zone of saturation, below which every pore space is filled with water
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| Alfred Wagner | Earth scientist who hypothesized that the Earht;s continents moved in slow but constant motion
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| 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
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| Pangea | A single large landmass that exsisted in the geologic past and was composed of all present day continents.
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