This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The acidity levels of the early oceans were much lower than today, so it took 4 billion years of ... (Read 68 times)

nevelica

  • Hero Member
  • *****
  • Posts: 563
on: Jul 15, 2018
The acidity levels of the early oceans were much lower than today, so it took 4 billion years of weathering in order to reach the level of salinity present in the oceans today.
 
  Indicate whether this statement is true or false.

Question 2

Scientific knowledge of many events of the Precambrian is limited because ________.
 
  A) metamorphism altered and deformed many rocks
  B) plate tectonics consumed many of the oldest tectonic plates
  C) many ancient rocks have been eroded
  D) any ancient rocks have been covered by a mantle of sediments
  E) metamorphism, plate tectonics, erosion, and sediments account for the limited knowledge of Precambrian events


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

enass

  • Sr. Member
  • ****
  • Posts: 380
Reply #1 on: Jul 15, 2018
Answer to Question 1

Thank you for answering this question.

Answer to Question 2

Answer: E


nevelica

  • Member
  • Posts: 563
Reply 2 on: Jul 15, 2018
:D TYSM

Bigfoot1984

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Body cavities. (A) Lateral view of a sagittal section through the body. (B) Anterior view of a front Body cavities. (A) Lateral view of a sagittal section through the body. (B) Anterior view of a front
Muscles of the lower extremity. Muscles of the lower extremity.
Oceans Layers Oceans Layers
Periodic oscillations of the levels of glycolytic intermediates in yeast cells undergoing glycolysis Periodic oscillations of the levels of glycolytic intermediates in yeast cells undergoing glycolysis
The upper waters of the oceans flow horizontally in currents The upper waters of the oceans flow horizontally in currents
The early onset of spring melting and the gradual diminution of summer snowpack The early onset of spring melting and the gradual diminution of summer snowpack
Video: Alternative Energy Sources

For a complete list of videos, visit our video library