This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What causes the apparent retrograde motion of the planets? A) As Earth passes another planet, its ... (Read 27 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
on: Jul 27, 2018
What causes the apparent retrograde motion of the planets?
 
  A) As Earth passes another planet, its gravitational pull slows down the other planet so that it appears to be traveling backward.
  B) When planets are farther from the Sun, they move slower than when they are nearer the Sun; it is during this slower period that they appear to move backwards.
  C) The other planets never really appear to move backward; the background stars shift due to Earth's revolution around the Sun.
  D) As Earth passes another planet, the other planet appears to move backward with respect to the background stars, but the planet's motion does not actually change.
  E) Apparent retrograde motion is an illusion created by turbulence in Earth's atmosphere.

Question 2

Which characteristic of Earth explains why we have an ultraviolet-absorbing stratosphere?
 
  A) the existence of photosynthetic life
  B) the existence of plate tectonics
  C) the moderate surface temperature
  D) the existence of oceans


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

A


plus1

  • Hero Member
  • *****
  • Posts: 676
Reply #2 on: Jul 27, 2018
TY


aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Possible Earth 5 billion years from now Possible Earth 5 billion years from now
6-8 Earth’s Major Tectonic Plates 6-8 Earth’s Major Tectonic Plates
Scales of Atmospheric Motion Scales of Atmospheric Motion
Earth’s Biomes "الأرض الحيوية" Earth’s Biomes "الأرض الحيوية"
What Drives Plate Motion What Drives Plate Motion
Idealized Tidal Bulges on Earth Idealized Tidal Bulges on Earth
Video: Mitochondrial Structure & ETC Protein Complexes (Protein Complexes and Electron Transport)

For a complete list of videos, visit our video library