« previous next »

Author Question: True or False: The most distinctive chemical and physical boundary within Earth is between the ... (Read 64 times)

Anajune7

  • Hero Member
  • *****
  • Posts: 574
on: Jul 16, 2018
True or False: The most distinctive chemical and physical boundary within Earth is between the mantle and core.
 
  Indicate whether this statement is true or false.

Question 2

Although spectacular collisions like comet Shoemaker-Levy 9 impact with Jupiter in 1994 provide evidence that planetary accretion is still occurring, near all the mass of the solar nebula now resides in the sun and planets.
 
  When did Earth, for the most part, attain its current mass and volume?
  A) 65 million years ago
  B) 12,000 years ago
  C) it hasn't
  D) 4,500 million years ago


Jane

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: TRUE

Answer to Question 2

Answer: D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

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?

Blood is approximately twice as thick as water because of the cells and other components found in it.

There are several laws of thermodynamics critical to understanding physical processes. Two of those There are several laws of thermodynamics critical to understanding physical processes. Two of those
The Sun as it appears from the surface of the Earth at sunrise. The Sun as it appears from the surface of the Earth at sunrise.
Tides on Earth Tides on Earth
Variety of chemical reagents strips. Variety of chemical reagents strips.
Testing the Chemical Characteristics of Urine with Reagent Strips Testing the Chemical Characteristics of Urine with Reagent Strips
Earth’s Revolution and Rotation: The Causes of Earth’s Seasons Earth’s Revolution and Rotation: The Causes of Earth’s Seasons
Video: Chemical Buffers - protein buffer, phosphate buffer system and bicarbonate buffer system

For a complete list of videos, visit our video library