Gr 9 NATURAL SCIENCES: CH 4.3 Separating minerals from waste

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What is the primary purpose of separating minerals from waste rock?

To make the minerals more visually distinguishable

To increase the size of the extracted minerals

To make the minerals usable (correct)

To make the waste rock more valuable

What is hand sorting commonly used for?

Separating small minerals from waste rock

Industrial-scale mining operations

Separating magnetic minerals from non-magnetic ones

Alluvial diamond mining in rivers (correct)

What is the role of electromagnets in magnetic separation?

To crush the waste rock into smaller pieces

To make the non-magnetic waste material more dense

To generate a magnetic field to attract magnetic minerals (correct)

To mix the ore and water together

What is the principle behind density separation?

The difference in density between minerals and waste rock Signup and view all the answers

Which of the following is an example of density separation?

Panning for gold Signup and view all the answers

What is the purpose of conveyor belts in magnetic separation?

To carry the ore past electromagnets Signup and view all the answers

Why are electromagnets useful in magnetic separation?

Because they can be turned on and off as needed Signup and view all the answers

What is the primary basis for separating gold from waste material in panning?

Density Signup and view all the answers

What is the purpose of size separation in mining?

To classify ore for export Signup and view all the answers

What is the role of chemicals in the flotation process?

To make minerals hydrophobic Signup and view all the answers

What is the outcome of the flotation process?

Valuable minerals are separated from waste rock Signup and view all the answers

What is the main limitation of physical separation methods?

They are not sufficient for separating minerals in chemical compounds Signup and view all the answers

What is the purpose of chemical separation in mining?

To break chemical bonds and separate elements from compounds Signup and view all the answers

What is the primary goal of separating minerals from waste rock in mining?

To ensure the efficient extraction and processing of valuable minerals Signup and view all the answers

What is the outcome of the chemical separation process?

The desired element is separated from the compound Signup and view all the answers

What is the main purpose of panning for gold?

To separate gold from waste material based on density Signup and view all the answers

What is the primary use of size separation in mining?

To classify ore for export Signup and view all the answers

What is the outcome of the flotation process?

Hydrophobic minerals are skimmed off Signup and view all the answers

What is the main limitation of physical separation methods?

They are not sufficient for separating minerals that are part of chemical compounds Signup and view all the answers

What is the role of air bubbles in the flotation process?

To carry hydrophobic minerals to the surface Signup and view all the answers

What is the purpose of chemical separation in mining?

To break chemical bonds holding atoms together Signup and view all the answers

What is the outcome of using chemicals in the flotation process?

Valuable minerals become hydrophobic Signup and view all the answers

Why are physical separation methods often sufficient for separating minerals like coal or iron ore?

Because they can be separated based on density or size Signup and view all the answers

What is the main advantage of using hand sorting in separating minerals from waste rock?

It is a manual method that can be used by individuals. Signup and view all the answers

What is the primary function of the conveyor belts in magnetic separation?

To carry the ore past the electromagnets. Signup and view all the answers

What is the main difference between magnetic separation and density separation?

The physical property used to separate the minerals. Signup and view all the answers

Which of the following is NOT a common method used to separate minerals from waste rock?

Electromagnetic separation. Signup and view all the answers

What is the main purpose of the electromagnets in magnetic separation?

To separate magnetic minerals from non-magnetic waste. Signup and view all the answers

What is the outcome of the density separation process?

The separation of dense minerals from lighter waste material. Signup and view all the answers

Which of the following separation methods is commonly used by individuals, such as alluvial diamond miners?

Hand sorting. Signup and view all the answers

What is the primary advantage of using magnetic separation over hand sorting?

It can be used on an industrial scale. Signup and view all the answers

What is the primary reason why electromagnets are useful in magnetic separation?

They can be turned on and off as needed. Signup and view all the answers

Which of the following statements is true about density separation?

It involves using the difference in density between minerals and waste rock to separate them. Signup and view all the answers

What is the primary limitation of hand sorting?

It is only effective for very large, visually distinguishable pieces of mineral. Signup and view all the answers

Which of the following is a common application of density separation?

Panning for gold. Signup and view all the answers

What is the primary function of the conveyor belts in magnetic separation?

To carry the ore past electromagnets that attract the magnetic iron ore. Signup and view all the answers

What is the primary difference between magnetic separation and density separation?

Magnetic separation is based on magnetic properties, while density separation is based on density differences. Signup and view all the answers

What is the primary reason why physical separation methods are often sufficient for separating minerals like coal or iron ore?

Because they have distinct physical properties Signup and view all the answers

What is the main mechanism by which valuable minerals are separated from waste rock in the flotation process?

Hydrophobicity and air bubbles Signup and view all the answers

What is the primary goal of chemical separation in mining?

To break chemical bonds and separate the desired element Signup and view all the answers

What is the main limitation of physical separation methods in mining?

They are not effective for separating minerals with similar physical properties Signup and view all the answers

What is the purpose of adding chemicals to the slurry in the flotation process?

To change the surface properties of the minerals Signup and view all the answers

What is the primary difference between panning for gold and size separation?

One is used for density separation, while the other is used for size separation Signup and view all the answers

What is the outcome of the chemical separation process?

The breaking of chemical bonds holding the desired element Signup and view all the answers

Why are chemicals added to the slurry in the flotation process?

To make the valuable minerals hydrophobic Signup and view all the answers

Gr 9 NATURAL SCIENCES: CH 4.3 Separating minerals from waste

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Questions and Answers

What is the primary purpose of separating minerals from waste rock?

What is hand sorting commonly used for?

What is the role of electromagnets in magnetic separation?

What is the principle behind density separation?

Which of the following is an example of density separation?

What is the purpose of conveyor belts in magnetic separation?

Why are electromagnets useful in magnetic separation?

What is the primary basis for separating gold from waste material in panning?

What is the purpose of size separation in mining?

What is the role of chemicals in the flotation process?

What is the outcome of the flotation process?

What is the main limitation of physical separation methods?

What is the purpose of chemical separation in mining?

What is the primary goal of separating minerals from waste rock in mining?

What is the outcome of the chemical separation process?

What is the main purpose of panning for gold?

What is the primary use of size separation in mining?

What is the outcome of the flotation process?

What is the main limitation of physical separation methods?

What is the role of air bubbles in the flotation process?

What is the purpose of chemical separation in mining?

What is the outcome of using chemicals in the flotation process?

Why are physical separation methods often sufficient for separating minerals like coal or iron ore?

What is the main advantage of using hand sorting in separating minerals from waste rock?

What is the primary function of the conveyor belts in magnetic separation?

What is the main difference between magnetic separation and density separation?

Which of the following is NOT a common method used to separate minerals from waste rock?

What is the main purpose of the electromagnets in magnetic separation?

What is the outcome of the density separation process?

Which of the following separation methods is commonly used by individuals, such as alluvial diamond miners?

What is the primary advantage of using magnetic separation over hand sorting?

What is the primary reason why electromagnets are useful in magnetic separation?

Which of the following statements is true about density separation?

What is the primary limitation of hand sorting?

Which of the following is a common application of density separation?

What is the primary function of the conveyor belts in magnetic separation?

What is the primary difference between magnetic separation and density separation?

What is the primary reason why physical separation methods are often sufficient for separating minerals like coal or iron ore?

What is the main mechanism by which valuable minerals are separated from waste rock in the flotation process?

What is the primary goal of chemical separation in mining?

What is the main limitation of physical separation methods in mining?

What is the purpose of adding chemicals to the slurry in the flotation process?

What is the primary difference between panning for gold and size separation?

What is the outcome of the chemical separation process?

Why are chemicals added to the slurry in the flotation process?

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