What is true about most higher-grade metallic ores?(1 point)
Responses
They are usually found deep below Earth’s surface—more than 1,000 ft underground.
They are usually found deep below Earth’s surface—more than 1,000 ft underground.
Most of them can be extracted using the placer method.
Most of them can be extracted using the placer method.
They are usually found very close to Earth’s surface—less than 1,000 ft underground.
They are usually found very close to Earth’s surface—less than 1,000 ft underground.
Most of them can be extracted without requiring drilling.
Most of them can be extracted without requiring drilling.
1 answer
The statement that is true about most higher-grade metallic ores is:
They are usually found deep below Earth’s surface—more than 1,000 ft underground.
Higher-grade metallic ores typically require more extensive mining operations, which often involve going deeper underground, as surface deposits are usually depleted over time.
