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 87 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
Wow, this really help

epscape

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

The Sun as it appears from the surface of the Earth at Sunset. The Sun as it appears from the surface of the Earth at Sunset.
Surface Water Parsing Surface Water Parsing
Water Access Water Access
Origin and Insertion Origin and Insertion
The Distribution of Water on Earth The Distribution of Water on Earth
Earth’s Early Atmosphere Earth’s Early Atmosphere
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library