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

Author Question: Which element would not have been found in Earth's early atmosphere? What is the most abundant gas ... (Read 69 times)

LCritchfi

  • Hero Member
  • *****
  • Posts: 519
on: Jul 27, 2018
Which element would not have been found in Earth's early atmosphere? What is the most abundant gas found in Earth's atmosphere today?
 
  a. nitrogen (N2)
 b. carbon dioxide (CO2)
  c. helium (He)
 d. hydrogen (H)
 e. oxygen (O2)

Question 2

Astronomers can determine the interiors of main sequence stars by _____.
 
  a. studying their atmospheres
 b. creating stellar models
 c. detailed observations of the Sun
 d. using the Hertzsprung-Russell Stellar Model (HRSM)
  e. satellite observations of the closest stars


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

b


LCritchfi

  • Hero Member
  • *****
  • Posts: 519
Reply #2 on: Jul 27, 2018
TY


jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Carnivorous plants, such as this pitcher plant (Sarracenia purpurea) are commonly found in bog habit Carnivorous plants, such as this pitcher plant (Sarracenia purpurea) are commonly found in bog habit
teach their children to care for the earth in hopes of passing on a better world to future generatio teach their children to care for the earth in hopes of passing on a better world to future generatio
Different types of fog found throughout the United States Different types of fog found throughout the United States
Heating of the atmosphere Heating of the atmosphere
Precession: Earth’s axis rotates, or “wobbles” Precession: Earth’s axis rotates, or “wobbles”
Wavelengths that penetrate the earth's atmosphere Wavelengths that penetrate the earth's atmosphere
Video: Major Elements in Biological Molecules: Lipids

For a complete list of videos, visit our video library