« previous next »

Author Question: There have been five mass extinctions in the last 450 million years. What are some of the possible ... (Read 59 times)

rlane42

  • Hero Member
  • *****
  • Posts: 594
on: Aug 22, 2018
There have been five mass extinctions in the last 450 million years. What are some of the possible cataclysmic events that lead to these mass extinctions?

Question 2

____ is the tool to finding solutions for environmental problems.
 A) Education
  B) Research
  C) Commissions and policies
  D) Time


juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Aug 22, 2018
Answer to Question 1

Scientists are not always certain of the cause of causes of each mass extinction, but leading candidates for a couple of these events include the collision of an asteroid or comet with Earth, or massive volcanism leading to rapid climate change. Other potential contributing factors or mass extinctions may include the breakup, collision, or rearrangement of continents, changing currents patterns, or even large-scale oceanic anoxic events.

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

rlane42

  • Hero Member
  • *****
  • Posts: 594
Reply #2 on: Aug 22, 2018
TY


juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Aug 22, 2018
You're welcome


« previous next »
 

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
“Mission Accomplished” proclaimed the banner on the USS Abraham Lincoln, where on May 1, 2003, Presi “Mission Accomplished” proclaimed the banner on the USS Abraham Lincoln, where on May 1, 2003, Presi
Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto
Polar ice caps lose mass as surface ice melts Polar ice caps lose mass as surface ice melts
Patients Older than 60 Years of Age Patients Older than 60 Years of Age
An unknown gas occupies a volume of 1.50 L at 21 °C and 0.950 atm. If the mass i An unknown gas occupies a volume of 1.50 L at 21 °C and 0.950 atm. If the mass i
Video: Neuron Structure Animation

For a complete list of videos, visit our video library