Author Question: Which of the following is an example of convection? A) different kinds of material separating by ... (Read 93 times)

notis

  • Hero Member
  • *****
  • Posts: 596
Which of the following is an example of convection?
 
  A) different kinds of material separating by density, like oil and water
  B) rocks sinking in water
  C) warm air expanding and rising while cooler air contracts and falls
  D) gas bubbling upward through a liquid

Question 2

What happens during the apparent retrograde motion of a planet?
 
  A) The planet appears to move eastward with respect to the stars over a period of many nights.
  B) The planet moves through constellations that are not part of the zodiac.
  C) The planet rises in the west and sets in the east.
  D) The planet moves backward in its orbit around the Sun.
  E) The planet moves backward through the sky.



ky860224

  • Sr. Member
  • ****
  • Posts: 350
Answer to Question 1

C

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

ky860224

  • Sr. Member
  • ****
  • Posts: 350

 

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

For a complete list of videos, visit our video library