« previous next »

Author Question: Which of the following best describes the Milky Way Galaxy? A) a spiral galaxy with a disk about ... (Read 25 times)

storky111

  • Hero Member
  • *****
  • Posts: 561
on: Jul 27, 2018
Which of the following best describes the Milky Way Galaxy?
 
  A) a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars
  B) a spherically shaped collection of stars including our solar system and about a dozen other solar systems, stretching about 4 light-years in diameter
  C) a spherically shaped collection of about 1 million stars that is about 100 light-years in diameter
  D) a spiral galaxy with a disk about a billion kilometers in diameter and containing between 100 million and 1 billion stars
  E) a spiral galaxy with a disk about 100,000 light-years in diameter and containing about 100,000 stars

Question 2

The core, mantle, and crust of a planet are defined by differences in their
 
  A) temperature. B) density. C) strength. D) geological activity.


bookworm410

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Hugging Galaxy Hugging Galaxy
Spiral tongue of butterflies Spiral tongue of butterflies
Variety in Spiral Arms Variety in Spiral Arms
Barred Spiral Galaxies Barred Spiral Galaxies
Milky Way Milky Way
Disk of Enheduanna Disk of Enheduanna
Video: Neurotransmission at chemical synapses & Excitory and inhibitory potentials

For a complete list of videos, visit our video library