Earth's Interior
What causes heat in the Earth's core that makes convection currents possible?
Radioactive Decay
S-Waves are unable to move through what type of material?
Liquids
What caused the Hawaiian Islands to form?
Hot spot
Which of these materials is the least dense?
A - 99.0 g/cm3
B - 97.6 g/cm3
C - 97.7 g/cm3
B - 97.6 g/cm3
If a rocks density increases it would move...
Toward the lower mantle
When an earthquake occurs, the seismograph stations ______ to the epicenter will be the first to detect it.
Closest
Volcanoes are usually found...
Along tectonic plate boundaries
Undersea earthquakes can also lead to what phenomena that is a big wave.
Tsunami
If we are talking about density of materials inside the Earth, what topic are we discussing?
Planetary Differentiation
If no S-waves are detected between 2,900 km deep and 5,200 km deep, what must that layer of the Earth be?
Liquid
If a plate is destroyed by subduction, that means it went _________ another plate.
Under
Convection currents occur in what layer of the Earth?
Mantle
If you put the following materials in a beaker with water and Layer 4 is at the bottom of the beaker, which would be in Layer 2?
A - 2.3 g/cm3
B - 2.9 g/cm3
C - 1.4 g/cm3
D - 1.3 g/cm3
C - 1.4 g/cm3
If a graph showing the speed of P-waves suddenly changes, what does it indicate happened to the P-Waves?
They entered a new layer of the Earth
In a rift valley, the tectonic plates are moving ________ from each other.
Away
Rock sinks to the lower mantle because its density...
Increased
What happens to rock once it reaches the upper mantle?
Its temperature goes down and its density increases.
If an earthquake occured at South Pole, which station would record the fewest seismic waves?
A - A station on the southern tip of South America
B - A station in northern Canada
C - A station in the middle of Australia
B - A station in northern Canada
Explain to me how studying the age of sediment in ocean basins helps to understand sea-floor spreading.
The newest material is found near mid-ocean ridges and it gets older the further you go from them.
What process forms mid-ocean ridges?
Oceanic crust separating and letting mantle material through to the surface