answers
How old is the Earth? - correct answer -4.6 Billion years old
In Geology we are interested in which three activities? - correct answer -past, present, future
How long ago was the "Big Bang"? - correct answer -14 Billion years
Principle of Uniformitarianism - correct answer -Earth processes occurring today are similar to those that occurred in the past
Name the two types of crust - correct answer -Continental and oceanic
How thick is the continental crust? - correct answer -40km
How thick is the oceanic crust? - correct answer -8-10km
Which of the two types of crust is heavier, more dense? - correct answer -Oceanic Crust
Oceanic crust is mainly made of ? - correct answer -Basalt
Continental crust is mainly made of ? - correct answer -Felsic (Granite rocks)
This separates the crust and the mantle - correct answer -Moho
How is the moho distinguished? - correct answer -seismic wave observations