Author Question: The earth system: A) cannot be affected by anything from space. B) is powered solely by the Sun. ... (Read 67 times)

jake

  • Hero Member
  • *****
  • Posts: 538
The earth system:
 
  A) cannot be affected by anything from space. B) is powered solely by the Sun.
  C) is the highest level of system possible. D) includes parts that affect one another.

Question 2

Which of the following heavy metals is/are associated with damage to the human nervous system?
 
  A) radon
  B) lead
  C) mercury
  D) mercury, lead, and radon
  E) mercury and lead


anyusername12131

  • Sr. Member
  • ****
  • Posts: 327
Answer to Question 1

D

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

For a complete list of videos, visit our video library