This topic contains a solution. Click here to go to the answer

Author Question: Approximately what percentage of the earth's crust is composed of oxygen? A) 5 B) 40 C) 50 ... (Read 90 times)

ghost!

  • Hero Member
  • *****
  • Posts: 560
Approximately what percentage of the earth's crust is composed of oxygen?
 
  A)  5
  B)  40
  C)  50
  D)  75

Question 2

Which of the following metals does the United States import from other countries?
 
  A) indium
  B) lithium
  C) palladium
  D) All of the above are imported from other countries.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

elyse44

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

C

Answer to Question 2

D





 

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

For a complete list of videos, visit our video library