« previous next »

Author Question: Which best describes Mercury's plains? a. heavily impacted with craters and large rays b. ... (Read 103 times)

karen

  • Hero Member
  • *****
  • Posts: 537
on: Jul 27, 2018
Which best describes Mercury's plains?
 
  a. heavily impacted with craters and large rays
 b. solidified lava flows that are a uniform gray color
  c. a geologically active surface of molten lava
 d. solidified lava flows rich in dark basalts
 e. a rich layer of soil containing iron and silicate

Question 2

A planetary nebula is a(n) ____.
 
  a. expanding envelope of ionized gas expelled by a dying medium-mass star
 b. expanding envelope of neutral gas and dust expelled by a dying medium-mass star
 c. contracting envelope of dusty material from planets destroyed by a dying medium-mass star
  d. contracting envelope of ionized interstellar medium absorbed by a dying medium-mass star
  e. expanding atmosphere of a medium-mass star as it becomes a red giant


soda0602

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
Mercury (element) Mercury (element)
Large-Flowered Trillium Large-Flowered Trillium
A portable mercury sphygmomanometer. Mercury versions are being phased out of medical offices and ... A portable mercury sphygmomanometer. Mercury versions are being phased out of medical offices and ...
Reed-Sternberg cells are large, abnormal lymphocytes that may contain more than one nucleus. These ... Reed-Sternberg cells are large, abnormal lymphocytes that may contain more than one nucleus. These ...
Video: Introduction to Macular Degeneration

For a complete list of videos, visit our video library