C6.1.9 - Biological metal extraction

Question 1

What happens when metal sulfides oxidise underwater?

Answer 1

It produces sulfuric acid

Question 2

What is bioleaching?

Answer 2

Biological method of metal extraction in which bacteria speed up reactions that release soluble metal compounds from metal sulfides

Question 3

What is a low-grade ore?

Answer 3

Rock with a low concentration of a metal

Question 4

What is a high-grade ore?

Answer 4

Rock with a high concentration of a metal

Question 5

What does carbon-neutral mean?

Answer 5

Refers to a process or activity in which there is no overall release of carbon dioxide to the atmosphere