Identify the material used to make these pipes.
Definitions:
Scientific Investigator
A person who conducts systematic research to discover and examine facts within a scientific context.
Science
A systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
Dallas County Judge
An elected official in Texas responsible for presiding over the county's Commissioners Court, which oversees the administration of county government.
Hypotheses
Plural of hypothesis, referring to multiple proposed explanations made as starting points for further investigation, which can be tested through research and experimentation.
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