How Did Researchers in the Mid-Twentieth Century Obtain Ocean Floor

question 59

Multiple Choice

How did researchers in the mid-twentieth century obtain ocean floor samples in order to determine the age of the seafloor?

• A)Satellite imagine images
• B)Deep-diving manned submersibles
• C)Hydraulic vacuum tubes
• D)Drilling ships

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Definitions:

Stem-Type

Referring to a type of valve or control that uses a stem-like component to operate or regulate flow.

Service Valve

A valve used in various mechanical and fluid systems for maintenance, repair, or diagnostic purposes, allowing for control of fluid flow.

Front-Seated

Typically refers to valves in refrigeration or HVAC systems that are in the open position when the valve stem is screwed in all the way.

Refrigerants

Fluids used in air conditioning and refrigeration systems to absorb and transport heat.