1. Along which features does seafloor spreading occur?
A. fault lines
B. mid-ocean ridges
C. ocean basins
D. ocean trenches
2. Which statement identifies a major reason for the subduction that helps to form volcanoes?
A. the release of hot ash and steam in a pyroclastic flow
B. the unusually high temperature at hotspots
C. the upwelling of magma between diverging plates
D. the difference in density of oceanic and continental plates
3. Ocean trenches form over millions or billions of years. Which statement accurately describes how ocean trenches form?
A. two plates of continental crust slide past each other
B. a plate of oceanic crust is subducted under a plate of continental crust
C. two plates of oceanic crust pull away from each other
D. a plate of continental crust collides with another plate of continental crust
4. Which features do most stratovolcanoes and cinder cone volcanoes have in common?
A. violent eruptions and thin, flowing lava
B. broad base with quiet eruptions
C. wide dome shape and thick lava
D. steep sides and violent eruptions
5. Why is no land created or destroyed at transform boundaries?
A. because the plates crumble into each other at these boundaries
B. because magma rushes into gaps at these boundaries
C. because the plates are more dense at these boundaries
D. because the plates only slip past each other at these boundaries
6. Geologists observed signs of widespread ancient glaciers from the same time period in areas across South America, Africa, Antarctica, India, and Australia. What theory did this observation support?
A.Most of Earth was once covered in a vast ice sheet.
B.Glaciers were once more common than they are today.
C.Those continents were once together as one supercontinent.
D.Earth was much farther than the sun than it is today.
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Hey guys does anyone know the answers to this im really struggling at this point i have been working on this test for the longest and today is the last day for me to submit it!!
Sue bruh ur useless if you're not gonna post anything that is gonna help just don't post anything at all
I can help you with that! Let's go through each question one by one.
1. To determine along which features seafloor spreading occurs, we need to assess the options. Seafloor spreading is a process in which new oceanic crust is created at mid-ocean ridges and then spreads apart as new crust forms. So, the correct answer is B. mid-ocean ridges.
2. The question asks for a major reason for subduction, which contributes to the formation of volcanoes. Subduction occurs when one tectonic plate is forced beneath another plate. Based on the options given, the correct answer is C. the upwelling of magma between diverging plates.
3. Ocean trenches form as a result of tectonic plate movements. Let's review the options. Two plates of continental crust sliding past each other (option A) form transform boundaries, not ocean trenches. The correct answer is B. a plate of oceanic crust is subducted under a plate of continental crust.
4. To identify features common to stratovolcanoes and cinder cone volcanoes, we can analyze the options. Stratovolcanoes and cinder cone volcanoes both exhibit steep sides, which rules out options A and B. The correct answer is D. steep sides and violent eruptions.
5. To understand why no land is created or destroyed at transform boundaries, we need to analyze the options. Transform boundaries occur when tectonic plates slide past each other horizontally. The correct answer is D. because the plates only slip past each other at these boundaries.
6. The observation of widespread ancient glaciers across different continents supports a specific theory. Let's break down the options. The fact that glaciers were once more common than they are today (option B) is not directly supported by the evidence. The correct answer is C. those continents were once together as one supercontinent (known as Pangaea).
Now you should have the correct answers for your test. Remember, understanding the underlying concepts and reasoning behind each answer will help you in future assessments. Good luck with your submission!
Apparently you didn't even Google these questions.
https://www.google.com/search?source=hp&ei=WDF8XYrmGY-UsgWmiobAAQ&q=+seafloor+spreading&oq=+seafloor+spreading&gs_l=psy-ab.3..0i131l2j0l8.3196.3196..4710...0.0..0.152.152.0j1......0....2j1..gws-wiz.00Qu3GdoG5E&ved=0ahUKEwiK8s2_hM_kAhUPiqwKHSaFARgQ4dUDCAg&uact=5