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

Author Question: A volcanologist extracts a piece of rock near a volcano site and observes no visible crystals. After ... (Read 24 times)

danielfitts88

  • Hero Member
  • *****
  • Posts: 535
on: Jul 16, 2018
A volcanologist extracts a piece of rock near a volcano site and observes no visible crystals. After studying the rock for a while, he assumes it is obsidian. Why does he do so?
 
  A) Obsidian is always hot.
  B) Obsidian forms underground.
  C) Obsidian is green.
  D) Obsidian forms in lava flows.

Question 2

Why should a student on a field trip in Yosemite National Park assume that a piece of rock, that when under a microscope shows tiny crystals, is basalt?
 
  A) Basalt forms in lava flows.
  B) Basalt forms underground.
  C) Basalt is green.
  D) Basalt is always hot.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

FergA

  • Sr. Member
  • ****
  • Posts: 352
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: A


danielfitts88

  • Member
  • Posts: 535
Reply 2 on: Jul 16, 2018
Gracias!

dyrone

  • Member
  • Posts: 322
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

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.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

By reflecting most visible light, snow creates a much cooler microclimate than nearby bare ground. By reflecting most visible light, snow creates a much cooler microclimate than nearby bare ground.
Erythematous rash in Lyme disease in the pattern of a "bull's-eye" at the site of ... Erythematous rash in Lyme disease in the pattern of a "bull's-eye" at the site of ...
Tummy rock to release energy blocks in the torso and head. Tummy rock to release energy blocks in the torso and head.
Early Pregnancy Visible Bleeding النزيف في بداية الحمل Early Pregnancy Visible Bleeding النزيف في بداية الحمل
A Girl Breathes Mist Through a Nebulizer, with a Bite Piece in Her Mouth A Girl Breathes Mist Through a Nebulizer, with a Bite Piece in Her Mouth
Video: Helper T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library