each question is 10 points each, and i don't get 4 questions. I am in Earth Science and in 9th grade i would appreciate it if some one would help me. THANKS !
Where have earthquakes occurred most frequently during the last one hundred years?
1) in the polar regions
2) in the interior of continental areas
3) along the pacific ocean coastlines
4) along the atlantic ocean coastlines
Which best describes a major characteristic of both volcanoes and earthquakes?
1) they are centered at the poles
2) they are located in the same geographic areas
3) they are related to the formation of glaciers
4) they are restricted to the southern hemisphere
which evidence causes most scientist to believe that seafloor spreading occurs at the Atlantic ridge?
1) oceanic crust is oldest at the ridge
2) large sedimentary folds exist in the mantle near the ridge
3) oceanic crust on both difes of the ridge is less dense than continental crust.
4) oceanic crust on both sides of the ridge shows matching patterns of reversed and normal magnetic polarity
the theory of continental drift suggest that the
1) continental moved due to the coriolis effect caused by the eartbs rotation
2) continents moved due to the coriolis effect caused b the earths rotation
3) present-day continents of south america and africa are moving towards each other
4) present day continents of south america and africa once fit together like puzzel parts.
Check this site for the first two questions.
http://www.crystalinks.com/rof.html
Then check these two sites for your last two questions.
http://en.wikipedia.org/wiki/Seafloor_spreading
http://pubs.usgs.gov/gip/dynamic/historical.html
To find the answer to each question, you need to analyze the given options and eliminate the incorrect ones based on your understanding of Earth Science concepts. Here's how you can approach each question:
Question 1: Where have earthquakes occurred most frequently during the last one hundred years?
To answer this question, you need to determine the regions where earthquakes are most common. Based on your knowledge of Earth Science, you can eliminate options 1) in the polar regions and 4) along the Atlantic Ocean coastlines since seismic activity is not typically high in those areas. This leaves you with options 2) in the interior of continental areas and 3) along the Pacific Ocean coastlines. Compare the frequency of earthquakes in these two regions and choose the one with more seismic activity.
Question 2: Which best describes a major characteristic of both volcanoes and earthquakes?
To answer this question, you need to identify a characteristic that is common to both volcanoes and earthquakes. Option 2) they are located in the same geographic areas can be eliminated since earthquakes can occur outside volcanic regions. Option 3) they are related to the formation of glaciers can also be eliminated since glaciers are not directly linked to either volcanoes or earthquakes. This leaves you with options 1) they are centered at the poles and 4) they are restricted to the southern hemisphere. Compare these options and choose the one that represents a characteristic common to both volcanoes and earthquakes.
Question 3: Which evidence causes most scientists to believe that seafloor spreading occurs at the Atlantic ridge?
To answer this question, you need to determine the evidence supporting seafloor spreading at the Atlantic ridge. Option 1) oceanic crust is oldest at the ridge can be eliminated since the youngest crust is typically found at the ridge. Option 2) large sedimentary folds exist in the mantle near the ridge can also be eliminated as sedimentary folds are not directly related to seafloor spreading. Option 3) oceanic crust on both sides of the ridge is less dense than continental crust can also be eliminated since the density difference is not the main evidence for seafloor spreading. This leaves you with option 4) oceanic crust on both sides of the ridge shows matching patterns of reversed and normal magnetic polarity, which is a major piece of evidence for seafloor spreading.
Question 4: The theory of continental drift suggests that the...
To answer this question, you need to recall the key concepts related to continental drift. Option 1) continental moved due to the Coriolis effect caused by the earth's rotation can be eliminated as the Coriolis effect is not the main driving force behind continental drift. Option 2) continents moved due to the Coriolis effect caused by the earth's rotation is a repetition of the previous option and can also be eliminated. Option 3) present-day continents of South America and Africa are moving towards each other is contrary to the concept of continental drift as they are moving apart. This leaves you with option 4) present-day continents of South America and Africa once fit together like puzzle parts, which aligns with the idea of continental drift and the existence of Pangaea.
Now you can apply these reasoning strategies to answer each question. Good luck!