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 73 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?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Your heart beats over 36 million times a year.

Range of Motion of the Hip Joint, Position of the Leg for Full External Rotation Range of Motion of the Hip Joint, Position of the Leg for Full External Rotation
Range of Motion of the Ankle and Foot, Eversion and Inversion Range of Motion of the Ankle and Foot, Eversion and Inversion
Microlensing Reveals an Extrasolar Planet Microlensing Reveals an Extrasolar Planet
Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer
Earth’s Revolution and Rotation: The Causes of Earth’s Seasons Earth’s Revolution and Rotation: The Causes of Earth’s Seasons
Earth’s Mineral Resources Earth’s Mineral Resources
Video: Definition of heart rate

For a complete list of videos, visit our video library