Earth's Layers
Outer layer of the Earth
Crust
What is the difference between Lava and Magma?
Lava is Magma that has erupted from a volcano (On the surface).
At what plate boundaries do volcanoes form?
Convergent and Divergent
What is the Law of Conservation of Mass?
Mass cannot be created or destroyed. Therefore, Mass can only be moved or change shape/structure.
Thickest layer of the Earth
Mantle
How do divergent plates move?
Which waves reach the surface first after an Earthquake, P waves or S waves?
P (Primary) Waves as they are the fastest moving waves.
What plate boundary forms mountains?
Continent-continent convergent boundaries
What is the Atomic Symbol for Silver?
Ag
What occurs in the mantle that drives plate tectonics?
Convection Currents
What event(s) occur at transform plate boundaries?
Earthquakes
How is the Epicentre of an Earthquake related to the Focus?
The Epicentre is the point on the surface, directly above the Focus of the Earthquake.
At which plate boundary is the Earth's crust created?
Divergent plate boundaries
Explain the difference between an Acid and a Base?
Teacher discretion.
What layer of the Earth is broken into tectonic plates?
Crust and top of the mantle OR Lithosphere
Who proposed the theory of continental drift?
Alfred Wegener
Explain how Liquefaction occurs.
Liquefaction occurs when an earthquakes waves vibrate the ground, causing it to behave like a liquid, breaking bonds and driving water up from the soil below.
How do volcanoes occur at plate boundaries?
Movement at plate boundaries allow magma to rise up from the mantle to the crust, where it becomes lava and forms volcanoes as it cools and solidifies. At convergent plate boundaries, the oceanic plate subducts and melts due to heat and friction, creating magma which can then rise up to the surface.
What are 2 indicators that a Chemical Change has occurred in a reaction?
Any 2 of the following;
Colour change
Temperature change
Precipitate (solid) formed
Gas given off (bubbling)
Lucky Dip Question: WHO AM I?
I was born in 12th of October 1968, in NSW.
My first career was as a HPE Teacher in England.
When I returned to Australia, I starred in many theatre productions where my Acting career began, with some early television acting, notably in The Man From Snowy River.
I had my breakthrough into Film starring in X-Men as Wolverine. Later starring in such films as Les Miserables, Van Helsing and Australia.
I am .... Hugh Jackman
How did Hawaii Form?
The Hawaiian Islands were formed by volcanic activity. The Hawaiian Islands are an example of an island chain created by hot-spot volcanism. Each island in the chain is successively older toward the northwest because the plate is moving northwest over a magma plume.
Explain why Volcanoes at the site of a subduction boundary are usually more explosive.
Subduction boundaries have oceanic crust, which have higher water content, subducting into the mantle. This causes gas to build up under the continental crust as the crust melts. When Volcanoes on the site of the gas build up erupt, the greater pressure causes more explosive eruptions.
Explain how seafloor spreading occurs, and it's link to Earths crust recycling.
Seafloor spreading occurs at mid-ocean ridges, where divergent plates push the crust away from each other, creating new crust at the mid-ocean ridge. The Earth's crust gets recycled where divergent plates subduct under another plate, melting the crust into the mantle.
Which radioactive particles (alpha, beta or gamma) have the lowest penetration?
Alpha, which can be stopped by paper.