« previous next »

Author Question: Rare-earth elements are called that because they are very rare. Indicate whether the statement is ... (Read 71 times)

APUS57

  • Hero Member
  • *****
  • Posts: 571
on: Jul 15, 2018
Rare-earth elements are called that because they are very rare. Indicate whether the statement is true or false.

Question 2

Due to the long history of environmental damage from acid-mine drainage, present-day mines can no
  longer be developed in a sulfide ore body. Indicate whether the statement is true or false.



kkenney

  • Sr. Member
  • ****
  • Posts: 352
Reply #1 on: Jul 15, 2018
Answer to Question 1

T

Answer to Question 2

F


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

APUS57

  • Hero Member
  • *****
  • Posts: 571
Reply #2 on: Jul 15, 2018
Correct answers!


kkenney

  • Sr. Member
  • ****
  • Posts: 352
Reply #3 on: Jul 15, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

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.

Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts
Elements of an Experiment Elements of an Experiment
Cutaway Drawing of Tholos, The So-called Treasury of Atreus Cutaway Drawing of Tholos, The So-called Treasury of Atreus
ELEMENTS OF ARCHITECTURE: The Roman Arch "القوس الروماني" ELEMENTS OF ARCHITECTURE: The Roman Arch "القوس الروماني"
Botulism A rare but serious paralytic illness caused by the bacterium Clostridium botulinum Botulism A rare but serious paralytic illness caused by the bacterium Clostridium botulinum
The Oceans of Earth The Oceans of Earth
Video: Control of ventilation rate by other brain centers (posts, hypothalamus & cerebral cortex)

For a complete list of videos, visit our video library