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

Author Question: What is the main visual difference between the lunar highlands and the lunar maria? What are the ... (Read 141 times)

ahriuashd

  • Hero Member
  • *****
  • Posts: 535
on: Jul 27, 2018
What is the main visual difference between the lunar highlands and the lunar maria? What are the implications of this observation?
 
  What will be an ideal response?

Question 2

What is a planetary nebula?
 
  A) The bipolar jets ejected by a T Tauri variable
  B) A planet surrounded by a glowing shell of gas
  C) The disc of gas and dust surrounding a young star that will soon form a solar system
  D) The ejected envelope, often bipolar, of a red giant surrounding a stellar core remnant
  E) A type of young, medium mass star


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 27, 2018
Answer to Question 1

The lunar highlands are very heavily cratered and the lunar maria are generally smooth. (More specifically, the maria contain only 3 percent as many craters per unit area as the highlands.) The difference in the amount of craters shows that the maria formed after the highlands, at the end of the heavy bombardment phase of the solar system. Radiometric dating of rocks from the highlands and maria shows that the heavy bombardment phase lasted no longer than a few hundred million years.

Answer to Question 2

D


ahriuashd

  • Member
  • Posts: 535
Reply 2 on: Jul 27, 2018
Excellent

dreamfighter72

  • Member
  • Posts: 355
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Properties of the Magnocellular, Parvocellular, and Koniocellular Divisions of the Visual System Properties of the Magnocellular, Parvocellular, and Koniocellular Divisions of the Visual System
How lenses correct visual problems: (A) emmetropia; (B) myopia; (C) hyperopia; (D) corrected myopia; ... How lenses correct visual problems: (A) emmetropia; (B) myopia; (C) hyperopia; (D) corrected myopia; ...
For some Americans, religion is an “easy-going, makes-little-difference” matter, as expressed in ... For some Americans, religion is an “easy-going, makes-little-difference” matter, as expressed in ...
How to Factor a Sum or Difference of Two Cubes How to Factor a Sum or Difference of Two Cubes
Deforestation is one of the main sources of greenhouse gas emissions Deforestation is one of the main sources of greenhouse gas emissions
Visual Cliff Experiment Visual Cliff Experiment
Video: Phases of mitosis

For a complete list of videos, visit our video library