Rocks solidified from molten material below ground are classified as ______________ igneous rocks.
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Wood from an ancient stump has a ratio of carbon-14 to carbo…
Wood from an ancient stump has a ratio of carbon-14 to carbon-12 that is one-fourth that of new wood. About how old is the stump? (Carbon-14’s half-life is 5730 years.)
An example of igneous rock is
An example of igneous rock is
S seismic waves can travel only through ______________.
S seismic waves can travel only through ______________.
In terms of geologic time, we are living in the __________ e…
In terms of geologic time, we are living in the __________ eon which began about 541 millions of years ago and the Holocene Epoch which began about 0.01 millions of years ago at the end of the last ice age.
Fossils that are useful in correlating rock layers are calle…
Fossils that are useful in correlating rock layers are called
A naturally occurring, crystalline, inorganic element or com…
A naturally occurring, crystalline, inorganic element or compound that possesses a fairly definite chemical composition and a distinctive set of physical properties is called a(n) ________________.
Most of the active volcanoes are located in an area along th…
Most of the active volcanoes are located in an area along the margins of the Pacific Ocean known as the _____________.
Most, but not all, geologists believe the Earth’s age to be…
Most, but not all, geologists believe the Earth’s age to be about______________ years.
Most earthquake damage is caused by
Most earthquake damage is caused by