The discovery of rocks from the Franklin Mountains in West Texas and eastern Antarctica being the same age, chemically, and geologically similar, along with sharing the same magma source, supports the topic of continental drift or the theory of plate tectonics. This evidence suggests that these two regions were once part of a larger landmass that has since split and drifted apart, supporting the idea that continents are not fixed and can move over geological time.
Scroll down to ensure you answer BOTH questions on this page.
Scientists recently discovered that rocks collected from the Franklin Mountains in West Texas and rocks collected from mountains in eastern Antarctica were exactly the same age. Further research showed that the rocks were chemically and geologically the same and came from the same magma source. This discovery provides evidence that supports one of the below topics. Pick the topic this type of evidence supports.
15 answers
The theory of Plate BLANK Response area was defined in the 1970s. It follows Alfred Wegener’s 1912
theory of continental drift. He believed the BLANK Response area were once one landmass.
theory of continental drift. He believed the BLANK Response area were once one landmass.
The theory of Plate Tectonics was defined in the 1970s. It follows Alfred Wegener’s 1912 theory of continental drift. He believed the continents were once one landmass.
match these terms to transform, divergent, and convergent plate boundary
fault line, mountain range, rift valley or oceanic ridge
fault line, mountain range, rift valley or oceanic ridge
Here are the matches for the terms with transform, divergent, and convergent plate boundaries:
- Transform Plate Boundary - Fault Line
- Divergent Plate Boundary - Rift Valley or Oceanic Ridge
- Convergent Plate Boundary - Mountain Range
These matches reflect the geological features typically associated with each type of plate boundary.
This satellite photograph shows an area in Alaska after a fire occurred. the river is close to the area of fire
What effect did the fire most likely have on the river in the 12 months after it occurred? Use the drop-down menus to complete the statement .
more/less sediment(soil, dirt, etc.) flowed into the river because the fire destroyed most of the vegetation(plants)/rocks/animals holding the sediment in place..
What effect did the fire most likely have on the river in the 12 months after it occurred? Use the drop-down menus to complete the statement .
more/less sediment(soil, dirt, etc.) flowed into the river because the fire destroyed most of the vegetation(plants)/rocks/animals holding the sediment in place..
The correct completion of the statement would be:
More sediment (soil, dirt, etc.) flowed into the river because the fire destroyed most of the vegetation (plants) holding the sediment in place.
This is because the loss of vegetation due to the fire can lead to increased erosion, allowing more sediment to enter the river.
An illustration shows the tectonic plates pushing together. The plate on the right dives underneath the plate on the left.
Select the statements that are TRUE.
(2 points)
Responses
Rift valleys are common at this type of boundary.
Rift valleys are common at this type of boundary.
This is a divergent boundary.
This is a divergent boundary.
This type of boundary can form an oceanic trench.
This type of boundary can form an oceanic trench.
Subduction is occurring at this plate boundary.
Subduction is occurring at this plate boundary.
Convection currents within the mantle are moving the plates.
Select the statements that are TRUE.
(2 points)
Responses
Rift valleys are common at this type of boundary.
Rift valleys are common at this type of boundary.
This is a divergent boundary.
This is a divergent boundary.
This type of boundary can form an oceanic trench.
This type of boundary can form an oceanic trench.
Subduction is occurring at this plate boundary.
Subduction is occurring at this plate boundary.
Convection currents within the mantle are moving the plates.
Based on the description provided, the following statements are TRUE:
- This type of boundary can form an oceanic trench.
- Subduction is occurring at this plate boundary.
- Convection currents within the mantle are moving the plates.
Explanation:
- The phrase "the plate on the right dives underneath the plate on the left" indicates a convergent boundary where subduction occurs, leading to the formation of oceanic trenches.
- Convection currents in the mantle indeed drive the movement of tectonic plates.
- The statements about rift valleys and divergent boundaries are incorrect for this scenario, as rift valleys are associated with divergent boundaries, not convergent ones.
Use the options below to complete the sentence from your Note-Taking Guide. (1 point)
Heat in the core causes magma to BLANK Response in columns in the mantle. The hot magma columns move the BLANK Response and then when the magma cools, it BLANK Response back towards the core.
Heat in the core causes magma to BLANK Response in columns in the mantle. The hot magma columns move the BLANK Response and then when the magma cools, it BLANK Response back towards the core.
Here is a completed version of the sentence using the options provided:
Heat in the core causes magma to rise in columns in the mantle. The hot magma columns move the tectonic plates and then when the magma cools, it sinks back towards the core.
something other than tectonic plates
Sure! Here’s the completed sentence with a different option:
Heat in the core causes magma to rise in columns in the mantle. The hot magma columns move the lithosphere and then when the magma cools, it sinks back towards the core.
magma, volcanos, crust
Here’s the completed sentence using the options you provided:
Heat in the core causes magma to rise in columns in the mantle. The hot magma columns move the crust and then when the magma cools, it sinks back towards the core.
1 answer