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

Author Question: What kind of sand is on white-sand beaches? Black-sand beaches? Give some details about each type. ... (Read 135 times)

bobypop

  • Hero Member
  • *****
  • Posts: 539
on: Jul 16, 2018
What kind of sand is on white-sand beaches? Black-sand beaches? Give some details about each type.
 
  What will be an ideal response?

Question 2

What is a way humans try to stop beach erosion?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

234sdffa

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Many white-sand beaches contain mostly quartz. Quartz is abundant in river sediment delivered to the sea because it is the weathering-resistant mineral that is most abundant in continental rocks. Quartz also lacks cleavage, so continuous movement and abrasion by waves do not easily break it. Black-sand beaches are common on basaltic volcanic islands. Basalt does not contain quartz to produce white sand, but the fine-grained igneous rock is crushed into small sand-size grains by wave erosion along the shore.

Answer to Question 2

Answer: By building groins, which are walls built perpendicular to the shoreline, and trap sediment on the upcurrent side to widen a beach. The longshore current erodes the beach, however, on the downcurrent side of the groin.


bobypop

  • Member
  • Posts: 539
Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

JaynaD87

  • Member
  • Posts: 368
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

White Blood Cells Involved in Immune Response White Blood Cells Involved in Immune Response
Induration measurement in a tuberculin skin test, a type IV hypersensitivity. Induration measurement in a tuberculin skin test, a type IV hypersensitivity.
MAGENTA, BLACK, GREEN, ON ORANGE MAGENTA, BLACK, GREEN, ON ORANGE
White blood cells White blood cells
Comparison of E-type Climates Comparison of E-type Climates
What title would chemists give to an orbital characterized by n=8 and 1=4? What title would chemists give to an orbital characterized by n=8 and 1=4?
Video: Membrane transport proteins - pores, gated channels and pumps

For a complete list of videos, visit our video library