« previous next »

Author Question: How were conditions on the early Earth of more than 3 billion years ago differen (Read 696 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 12, 2013
How were conditions on the early Earth of more than 3 billion years ago different from those on today's Earth?
A) Only early Earth was intensely bombarded by large space debris.
B) Only early Earth had an oxidizing atmosphere.
C) Less ultraviolet radiation penetrated early Earth's atmosphere.
D) Early Earth's atmosphere had significant quantities of ozone.


Millan

  • Sr. Member
  • ****
  • Posts: 368
Reply #1 on: Jul 13, 2013
I know it's A, we did this last month ;)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

penguins

  • Hero Member
  • *****
  • Posts: 903
Reply #2 on: Jul 18, 2013
Thank you, thank you!!


« previous next »
 

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

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

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth
The Tilt of Earth’s Axis The Tilt of Earth’s Axis
Four Brain Structures with High Myelination in Early Childhood Four Brain Structures with High Myelination in Early Childhood
El Anatsui, Between Earth and Heaven. El Anatsui, Between Earth and Heaven.
Geothermal energy and powers Earth’s systems Geothermal energy and powers Earth’s systems
RUSP 34 Core Conditions for Newborn Genetic Screening RUSP 34 Core Conditions for Newborn Genetic Screening
Video: Lipid catabolism - lipolysis and beta oxidation and oxidation of fatty acids

For a complete list of videos, visit our video library