Earth Layers
What is the outer most portion of the Earth called
The Crust
Why do tectonic plates move?
Convection currents in the Mantle.
What is the place where the earthquake forms underground called?
The focus point
What two types of weathering are there
Physical and chemical.
What is the uppermost part of the crust called?
The organic layer
What is the innermost portion of the Earth Called
The inner core
How many major tectonic plates are there?
seven to eight
What is the study of earthquakes called?
Seismology
Physical weathering is caused by __________, windblown sand, or ice.
water.
What is the subsoil a mixture of?
It is a mixture of sand, sand, silt, or clay.
How hot does the lower mantle get?
3700 degrees Celsius
When two continental plates collide, what do they create?
Mountain ranges
What is the name of the earthquake zone that surrounds the Pacific Ocean and includes countries like Japan, New Zealand, and parts of Canada and the USA?
Ring of Fire
Plants can also cause physical weathering. How do they do this?
By splitting rocks as they grow into cracks in the rock.
What layer contains minerals mixed with organic material?
The surface layer
How far down is the centre of the Earth's core?
4,000 km
When a continental plate collides with an oceanic plate, the oceanic plate sinks below the continental plate. What is the zone where this happens called?
A subduction zone
What are the four types of seismic waves called?
P wave, S wave, Love wave, and Rayleigh waves.
What does acid rain do to statues
Wears the facial features away.
Substratum is made up of what material
Parent rock
What is the outer core made of
Molten Iron and Nickle
An ocean ridge is formed at what type of plate boundary
Divergent plate boundary
What are the three plate boundaries called?
Divergent boundaries, Convergent boundaries, and Transform boundaries
oxygen mixed with water reacts with iron-containing minerals. Making the rocks brittle and crumbly, and turning them a ___________ __________ color.
rusty red
What is the layer that includes unweathered parent material called
Bedrock