14-4 Flashcards
what are the two nonliving resources as energy products?
oil and natural gas
explain oil and natural gas. how do they form?
form from remains of dead marine organisms. Organisms sink to the bottom of the ocean and buried by sediments, heat and pressure transforms it into oil and natural gas
what do oil rigs do?
drill rocks ocean floor
what are gas hydrates?
compact chemical structures made of water and natural gas (methane). when things decompose at the bottom of ocean it turns into methane gas. Gets trapped in mud but when they bring it up it warms up and starts to ignite. Source of fuel
what are evaporative salts? how is it a resource?
as seawater evaporates, salt concentration increases until no longer dissolved, precipitate out of solution forming salt deposits.
what is desalination?
process of extracting fresh water from ocean water, provides fresh water for many dry areas and islands
how is sand and gravel a resource?
mining is second to offshore oil, use offshore barges using suction devices to collect.
what are placer deposits?
formed from rivers carrying sediments into ocean, slow down and drop sediments along coastal areas
what are manganese nodules? how are they a resource?
hard lumps of manganese, iron, and smaller amounts of copper, nickel, and cobalt. Metals precipitate around objects. “chimneys” of mineral deposits form, these vents release a lot of minerals into water