Identify the plate boundary at which each land form, or event, can occur.

Here’s the classification of where each landform or event can occur:

1. Ocean Trench

   • Convergent (Occurs where one tectonic plate is subducting beneath another)

2. New Sea Floor

   • Divergent (Occurs at mid-ocean ridges where tectonic plates are pulling apart)

3. Earthquakes

   • Convergent (Occurs along subduction zones and collision boundaries)
   • Transform (Occurs along transform faults where plates slide past each other)

4. Rift Valley

   • Divergent (Occurs where tectonic plates are moving apart on land, forming valleys)

Here’s a summary in table format:

| Land Form/Event | Convergent | Divergent | Transform | |---------------------|------------|-----------|-----------| | Ocean Trench | Yes | No | No | | New Sea Floor | No | Yes | No | | Earthquakes | Yes | No | Yes | | Rift Valley | No | Yes | No |

Convection Current in Mantle
crust
mantle
Earth's Core
Movement of less-dense material
Heating of cooler material
Cooling of warmer material
Movement of denser material

The terms you've listed can be organized according to their roles and functions in the context of convection currents in the Earth's mantle:

1. Convection Current in Mantle:

   • Movement of less-dense material (the warmer, less-dense material rises)
   • Heating of cooler material (heat from the core warms the mantle material)
   • Cooling of warmer material (the material cools as it rises and spreads out)
   • Movement of denser material (the cooled, denser material sinks back down)

2. Crust:

   • The Earth's outermost layer, which is affected by convection currents in the mantle but does not participate directly in the material movement.

3. Mantle:

   • The layer where convection currents occur; it is composed of semi-solid rock that flows over geological time.

4. Earth's Core:

   • Provides heat to the mantle, driving convection currents through the transfer of thermal energy.

In summary:

• Movement of less-dense material: In the mantle as it heats up.
• Heating of cooler material: Occurs as mantle material is heated by the Earth's core.
• Cooling of warmer material: Happens when this material reaches the upper mantle and the crust.
• Movement of denser material: The cooled material, which then sinks back down into the mantle.

These processes explain the cyclical nature of convection currents that drive plate tectonics.

The diagram below represents a convection current in Earth's mantle.

Move each event to the place it is occurring on the diagram.



(2 points)
Drop target 1
Drop target 2
Drop target 3
Drop target 4
Convection Current in Mantle
crust
mantle
Earth's Core
Movement of less-dense material
Heating of cooler material
Cooling of warmer material
Movement of denser material

To accurately place the events on the convection current diagram in Earth's mantle, let’s identify the labels for each part of the diagram efficiently. Here’s how you should position each event:

1. Earth's Core: Place this label at the bottom of the diagram since it represents the heat source that warms the mantle.

2. Heating of cooler material: This event should be placed in the part of the mantle where the material is being heated by the Earth's core.

3. Movement of less-dense material: This will occur as the heated, less-dense material rises towards the crust. Place this near the top of the mantle section where material is rising.

4. Cooling of warmer material: Position this label in the upper part of the mantle where the material is spreading out and cooling before sinking back down.

5. Movement of denser material: This should be placed at the bottom of the diagram where the cooled, denser material sinks back towards the core, completing the convection current loop.

6. Crust: Label this at the top of the diagram to represent the Earth's outer layer.

Summary of correct placements:

• Earth's Core: Bottom of the diagram
• Heating of cooler material: Middle area of the mantle (rising portion)
• Movement of less-dense material: Near the top of the mantle (rising towards the crust)
• Cooling of warmer material: Upper mantle (spreading out and cooling)
• Movement of denser material: Bottom of the mantle (sinking back towards the core)
• Crust: Top of the diagram

This arrangement visually represents the flow of the convection currents in the mantle due to the heat from the Earth's core.

In which layer of Earth do convection currents occur?(1 point)
Responses

Crust
Crust

Mantle
Mantle

Outer Core
Outer Core

Inner Core
Inner Core

Convection currents primarily occur in the Mantle.

So the correct response is:

Mantle

Use the drop down menu to make the following statement TRUE. (2 points)
Subduction happens when a(n)
and oceanic plate
. The
dense plate sinks beneath the other. This creates a
.​​​​​​​

Here's how to fill in the blanks to make the statement true:

"Subduction happens when a(n) oceanic plate and oceanic plate collide. The more dense plate sinks beneath the other. This creates a trench."

So the completed statement is:

"Subduction happens when an oceanic plate and oceanic plate collide. The more dense plate sinks beneath the other. This creates a trench."

What is NOT true about Hotspots(1 point)
Responses

Hotspots form volcanoes
Hotspots form volcanoes

Hotspots have helped in the formation of the Hawaiian Islands
Hotspots have helped in the formation of the Hawaiian Islands

Hotspots are only located along plate boundaries
Hotspots are only located along plate boundaries

Hotspots stay in one place while the tectonics plate moves across it

The statement that is NOT true about hotspots is:

Hotspots are only located along plate boundaries.

This is incorrect because hotspots can occur in the interior of tectonic plates, away from plate boundaries, as is the case with the Hawaiian Islands.