Lava lamps are commonly used to illustrate how convection cells ...

[anshika]

Lava lamps are commonly used to illustrate how convection cells in the mantle convey heat from the core to the exterior of the Earth. Explain how convection works, using a lava lamp as a proxy for the Earth.
 
  What will be an ideal response?

Question 2

Explain how geologists regarded the positions of the ocean basins and the continents prior to the advent of plate tectonics and how that perspective differs from how modern geologists regard those same features.
 
  What will be an ideal response?

[ong527]

Answer to Question 1

Answer: The bulb at the base of the lamp warms the wax in the lamp. The thermal energy from the absorbed heat causes the atoms of the wax to move farther apart, making the wax less dense and allowing it to rise. Once at the top, the wax begins to cool, losing thermal energy. The atoms of wax move closer together, making the wax denser and forcing it to sink. Once the wax gets near the bulb again, it begins to warm again and the process starts all over.

Answer to Question 2

Answer: Prior to the 1960s, geologists viewed the ocean basins and continents as fixed features: they neither grew nor moved. They also believed both were incredibly old. However, after the development of the theory of plate tectonics in the 1960s, geologists realized that the continents do migrate across the globe, a process that changes the size and shape of the ocean basins. As a result, some ocean basins are much younger than was previously believed.

[anshika]

Thank you

[ong527]

No problemo