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Science Exam Sem. 2
| Question | Answer |
|---|---|
| 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
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