« previous next »

Author Question: Which best describes Mercury's plains? a. heavily impacted with craters and large rays b. ... (Read 53 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?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Large Munsterländer Large Munsterländer
Lestidae is a rather small family of cosmopolitan, large-sized, slender damselflies. They are of the Lestidae is a rather small family of cosmopolitan, large-sized, slender damselflies. They are of the
Anatomy Of Large Intestine Anatomy Of Large Intestine
Major Impacts on Mercury and on Our Moon Major Impacts on Mercury and on Our Moon
Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery
Placard near driver’s door, including what devices in the vehicle contain mercury. Placard near driver’s door, including what devices in the vehicle contain mercury.
Video: Ionic bonds - role of ions in the body

For a complete list of videos, visit our video library