What are the 4 Layers of the Earth

Where are the Asthenosphere and Lithosphere located?

What is the composition of the Crust?

What is the composition of the lithosphere?

What is the composition of the Asthenosphere?

What is the mantle composed of?

What is the composition of the core?

What are the thicknesses of the layers of the Earth?

From where does the most understanding of the composition of the Earth and the nature of the Earth's interior come?

Rank the following rocks from highest to lowest density and name which layer they come from.
Peridotite, Granite, Iron, Basalt

What is density?

How is density calculated?

What happens to the volume of a substance as it is heated? How does this effect its density?

How does density relate to the formation of the layers of the Earth?

Who was Alfred Wegener?

What were the four pieces of evidence Wegener found?

Explain further on this evidence

Name the smaller supercontinents formed from the splitting of Pangea and describe the continents that made them up

Explain the difference between and observation and an inference

Explain the difference between a Hypothesis and a Theory.

Describe the weaknesses in Wegener’s hypothesis and explain the reasons that the scientific community rejected it

Who was Harold Hess?

Describe the observations and evidence used by Harry Hess to explain the unusual topography of the ocean floor in his report: “The history of the ocean basins”.

What was Hess's evidence?

Explain on Each

What is magnetite? Name three iron –rich volcanic rocks that could be found making up the ocean floor.

Explain Sea Floor Spreading

Describe and explain the process of convection within the mantle and how this relates to plate motion.

Explain why there is no oceanic crust that is much older than 200 million years, even though the earth is thought to be 4500 million years old.