« previous next »

Author Question: Briefly describe how igneous rocks are classified. What will be an ideal ... (Read 53 times)

Bob-Dole

  • Hero Member
  • *****
  • Posts: 547
on: Jul 16, 2018
Briefly describe how igneous rocks are classified.
 
  What will be an ideal response?

Question 2

Which is not a danger associated with volcanic ash?
 
  A) Ash gets caught in jet engines causing them to fail.
  B) Ash can set fire to everything it falls on.
  C) Ash can cause roofs to collapse.
  D) Ash, if exposed to enough heat, can turn back to lava.


af

  • Sr. Member
  • ****
  • Posts: 356
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Composition (minerals present) and texture (crystal size) are used to classify and name igneous rocks. Ultramafic, mafic, intermediate, and felsic are compositional categories for magma and igneous rocks. Light-colored silicate minerals dominate in silica-rich felsic rocks, whereas darker silicate minerals form mafic rocks.

Answer to Question 2

Answer: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Leonardo da Vinci, Madonna of the Rocks. Leonardo da Vinci, Madonna of the Rocks.
How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d) How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d)
Glassy Igneous Texture Glassy Igneous Texture
Chemical, Biochemical, and Organic Sedimentary Rocks Chemical, Biochemical, and Organic Sedimentary Rocks
Determining the Ages of Rocks Using Fossils Determining the Ages of Rocks Using Fossils
IMAGES THAT DESCRIBE CELLULAR PARTS IMAGES THAT DESCRIBE CELLULAR PARTS
Video: Energy sources - types

For a complete list of videos, visit our video library