« previous next »

Author Question: How has solar luminosity changed during the past 4.6 billion years? What will be an ideal ... (Read 112 times)

kshipps

  • Hero Member
  • *****
  • Posts: 571
on: Jul 14, 2018
How has solar luminosity changed during the past 4.6 billion years?
 
  What will be an ideal response?

Question 2

Why is stratospheric ozone important to humans?
 
  What will be an ideal response?


steff9894

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 14, 2018
Answer to Question 1

When the Sun first formed 4.6 billion years ago, it is believed to have been about 30 less luminous than it is today. The Sun's luminosity increased slowly at first and then more rapidly as the buildup of helium in its core continued. At present, the Sun is thought to be brightening by about 1 every hundred million years.

Answer to Question 2

Stratosphere ozone is important to living organisms because it absorbs many of the Sun's harmful ultraviolet rays. Ultraviolet radiation causes skin cancer and other health problems in humans.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

(a) Solar-driven air circulation (a) Solar-driven air circulation
The Solar Corona The Solar Corona
Abundant cave art after about 30,000 years ago is evidence of the importance of symbolic behavior fo Abundant cave art after about 30,000 years ago is evidence of the importance of symbolic behavior fo
A boy walks past a member of the unofficial “community police” in Cruz Grande, Guerrero, Mexico. A boy walks past a member of the unofficial “community police” in Cruz Grande, Guerrero, Mexico.
What Happens to Incoming Solar Radiation? What Happens to Incoming Solar Radiation?
Earth 600 Million Years Ago Earth 600 Million Years Ago
Video: Functional zones in a mitochondrion

For a complete list of videos, visit our video library