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

Author Question: What caused Earth to partially melt when being formed? a. Impact of asteroids, comets, and debris ... (Read 44 times)

cdr_15

  • Hero Member
  • *****
  • Posts: 546
on: Aug 22, 2018

What caused Earth to partially melt when being formed?
  a. Impact of asteroids, comets, and debris
  b. Gravitational compression
  c. Accumulation of decaying radioactive elements
  d. A combination of all of these choices



Question 2

What key characteristic marks the beginning stages of the collapse of a star?
  a. The increase in temperature
  b. The depletion of carbon and oxygen
  c. The depletion of hydrogen
  d. The expulsion of energy



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fatboyy09

  • Sr. Member
  • ****
  • Posts: 358
Reply #1 on: Aug 22, 2018
Answer to Question 1

ANS: D
Asteroids, comets, and debris heated the surface of Earth. Combined with gravitational compression
and decaying radioactive elements, this caused Earth to partially melt. Information can be found in the
section Earth, Ocean, and Atmosphere Accumulated in Layers Sorted by Density



Answer to Question 2

ANS: C
The lack of hydrogen in a star marks its death. The rapid compression of the core then causes the
internal temperature to increase. In turn, this allows for the formation of heavy metal atoms.
Information can be found in the section Stars and Seas



cdr_15

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Aug 22, 2018
Both answers were spot on, thank you once again


fatboyy09

  • Sr. Member
  • ****
  • Posts: 358
Reply #3 on: Aug 22, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Variegated leaves caused by a mutation in cpDNA Variegated leaves caused by a mutation in cpDNA
Size comparison of Earth and Mars. Size comparison of Earth and Mars.
teach their children to care for the earth in hopes of passing on a better world to future generatio teach their children to care for the earth in hopes of passing on a better world to future generatio
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Views of Earth’s Surface Views of Earth’s Surface
Obliquity "Tilt of Earth on its axis" Obliquity "Tilt of Earth on its axis"
Video: Insulin (glucose uptake by body cells), glycogenesis and lipogenesis

For a complete list of videos, visit our video library