Compared to the age of the Universe of about 14 billion years, the currently
accepted age of Earth is
about ________ years as determined by using radioactivity for dating rocks
and minerals.
A) 4.6 thousand
B) 4.6 billion
C) 5.4 million
D) 13.7 billion
✓✓✓✓~ B
The ________ division of the geologic time scale is an era of the Phanerozoic
Eon.
,A) Paleocene
B) Paleozoic
C) Permian
D) Proterozoic
✓✓✓✓~ B
The Earth's core was formed from ________.
A) a massive nickel iron asteroid that was the nucleus upon which Earth
condensed
B) high density radioactive carbon
C) the left over nickel and iron that would not fit into the earlier formed crust
and mantle
D) molten iron and nickel that separated from silicates and sank due to its
higher density
,✓✓✓✓~ D
Pangaea was ________.
A) a large, ocean basin that opened in the Triassic and closed in the Paleocene
B) a large, Precambrian shield area in Africa and South America that broke
apart late in the Proterozoic Eon
C) a huge mountain range that formed when Africa pushed northward into
Europe in Eocene time
D) a super continent that formed in the late Paleozoic and broke apart in
Triassic time
✓✓✓✓~ D
The oceanic crust is made of mafic rock called ________ and is about
________ thick on average
, A) basalt, 7 km
B) marine sedimentary rocks, 25 km
C) basalt, 70 km
D) granite, 35-40 km
✓✓✓✓~ A
The composition of the upper mantle of Earth is thought to be
A) basalt
B) granite
C) peridotite
D) iron-nickel alloy
✓✓✓✓~ C
Which one of the following statements is not correct?
A) Metamorphic rocks may melt to magma.
B) Sedimentary rocks may weather to igneous rocks.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Latestupdate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.79. You're not tied to anything after your purchase.
