« previous next »

Author Question: Some environmental changes that occur on Earth accumulate very slowly so that careful scientific ... (Read 64 times)

kamilo84

  • Sr. Member
  • ****
  • Posts: 495
on: Aug 7, 2018
Some environmental changes that occur on Earth accumulate very slowly so that careful scientific study over the long term is required to understand what is occurring.
  Indicate whether the statement is true or false

Question 2

The two most common elements found in Earth's crust are ____.
 a. silicon and magnesium
  b. sodium and carbon
 c. iron and aluminum
 d. silicon and oxygen
 e. carbon and potassium


jomama

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Aug 7, 2018
Answer to Question 1

T

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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?

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?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Earth’s Spheres Earth’s Spheres
Earth’s orientation Earth’s orientation
Sustainability and the Development within Environmental Constrains Sustainability and the Development within Environmental Constrains
Precession: Earth’s axis rotates, or “wobbles” Precession: Earth’s axis rotates, or “wobbles”
Earth Atmosphere Earth Atmosphere
Wavelengths that penetrate the earth's atmosphere Wavelengths that penetrate the earth's atmosphere
Video: Anatomy and Chemical Makeup of a Single Hair (Animation)

For a complete list of videos, visit our video library