Question | Answer |
What would you expect after an explosive eruption? | darkened skys |
What does acinder cone volcano have? | steep slopes |
What is a extinct volccano? | a volcano that will probably never erupt agian |
How are volcanoes created? | repeated eruptions of lava |
Where are volcanoes most likely to form? | along plate boundarys |
What would you expect after a noneplosive eruption? | huge lava flows |
Where does molten rock often gather? | magma chamber |
If the water content is high what is likley to happen? | an explosive eruption |
What type of lava flows most like dripping wax? | pahoehoe |
What type of lava is forms in jumbled heaps of sharp chunk near the vent? | Blocky lava |
What type of pyroclastic material means little stones? | Lapilli |
What is the pryoclastic material that can reach the upper atomsphere that circles the earth for years? | Volcanic ash |
Describe a possible climate change caused by a volcanic eruption? | Ash blocks the sunlight causing temperature to drop. |
When rock begins to melt... | temperature and pressure decreases |
What type of volcane will likely erupt in the near future? | active volcano |
what does a tiltometer measure? | change in the volcanos slope |
Where is a volcano likely to form? | along plate boundarys |
Lava theat has liquid runny consistency probably... | has a low silica content |
Volcanic activity along the Mid-Atlantic Ridge. This activity occurs at | a divergent boundary |
Which of the following is NOT considered when predicting volcanic eruptions? | atmospheric activity |
How are volcanoes created? | by many eruptions of lava |
What is most likely to happen if the water content is high in magma? | an explosive eruption |
What is a rift? | a crack in the earths crust |
Mount Rainier and Mount St Helens are... | composite volcanoes |
How do scientists classify pyroclastic material? | by size |
Which type of volcano will never erupt agian? | extinct |
What does subduction mean | when continental crust slides under oceanic crust |
what is the term given to the temperature at wich condesation forms? | Dew point |
What is the term given to stratus clouds that are found at a very low level? | fog |
Where does a continental polar air mass form? | North Canada |
Does a anticyclone have high or low pressure? | high |
Does a cyclone have high or low pressure? | low |
What are the most powerful storms on earth? | hurricanes |
Which part of the hurricane has warm calm air and light winds? | THE eye |
A thunderstorm is most likley created by what type of cloud? | cumulonimbus |
What instument measures air pressure? | barometer |
when you see weather systems on the news where do they come from? | weather sattelights |
On a station modle what does the tail off the circle reprsent? | wind speed and direction |
What do tetonic plates consist of? | continental and oceanic crust |
Wegner thought that all thecontinents were once together in one large continent called? | Pangea |
Evidence for sea-floor spreading has come from? | magnetic minerals on the ocean floor |
A possible result of plates moving along a trnsform boundary is? | earthquakes |
What is the outermost layer of the Earth called? | lithospere |
What type of fault usually occurs because of compression? | reverse |
In a reverse fault,where does the hanging wall move realitive to the footwall? | upward |
In a normal fault, where does the hanging wall move relative to the footwall? | downward |
What kind of force can lead to mountians with sharp,jagged peaks? | tension |
What type of boundary is formed when plates seperate? | divergent |
What doees NOT provide evidence for continental drift | oceanic plate theory |
The consists of mostly of what? | iron |