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

Author Question: What is the current debate about the origin of water on Earth? What will be an ideal ... (Read 76 times)

mydiamond

  • Hero Member
  • *****
  • Posts: 804
on: Jul 27, 2018
What is the current debate about the origin of water on Earth?
 
  What will be an ideal response?

Question 2

The period-luminosity relation for Cepheid and RR Lyrae variable stars can be used for ______________.
 
  Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

blakeserpa

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 27, 2018
Answer to Question 1

Water on Earth may have arrived from the bombardment of icy planetesimals, or comets. Evidence has shown from comet LINEAR that it contained water with a ratio of isotopes similar to the water on Earth.

Answer to Question 2

distance measurements


mydiamond

  • Member
  • Posts: 804
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

flexer1n1

  • Member
  • Posts: 373
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

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?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Polar covalent bonds in water molecules Polar covalent bonds in water molecules
2-1b Structure of the water molecule 2-1b Structure of the water molecule
Movement of Water in the World Ocean Movement of Water in the World Ocean
The Oceans of Earth The Oceans of Earth
Work of Running Water Work of Running Water
Earth 340 Million Years Ago Earth 340 Million Years Ago
Video: Four Giant Convection Cells oF Earth

For a complete list of videos, visit our video library