« previous next »

Author Question: Oceans of water and continental crust were present A) 150 000 000 years after Earth formed. B) ... (Read 95 times)

cagreen833

  • Hero Member
  • *****
  • Posts: 544
on: Jul 16, 2018
Oceans of water and continental crust were present
 
  A) 150 000 000 years after Earth formed.
  B) 2 000 000 000 years after Earth formed.
  C) 15 000 000 years after Earth formed.
  D) 75 000 000 years after Earth formed.

Question 2

What determines the chemical composition of the dust particles that form around a protostar?
 
  A) heat
  B) pressure
  C) contents of the star that exploded to form the protostar
  D) gravity of nearby objects


owenfalvey

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

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?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Annual net primary productivity on Earth. Annual net primary productivity on Earth.
White tiger in water at the Singapore Zoo White tiger in water at the Singapore Zoo
Landmarks in the evolution of life on Earth Landmarks in the evolution of life on Earth
Hints of Earth’s Early Appearance Hints of Earth’s Early Appearance
Land/Water Interactions Land/Water Interactions
Hydrogen burns to produce energy and water Hydrogen burns to produce energy and water
Video: What Are Carbohydrates? Importance of Carbs & High Carb Food

For a complete list of videos, visit our video library