Unit 1 Carbon Cycle

Question 1

Carbon sink

Answer 1

A carbon reservoir that stores more carbon than it releases

Question 2

Carbon source

Answer 2

A process that adds carbon to the atmosphere

Question 3

Photosynthesis

Answer 3

Primary producers take co2 into their tissues to make sugar

Question 4

Respiration

Answer 4

Co2 is returned to atmosphere as organisms break down sugar for energy (cellular respiration)

Question 5

Exchange

Answer 5

Exchange of co2 b/w atmosphere and ocean

Question 6

Sedimentation

Answer 6

Some dissolved CO2 i the ocean combines with calcium ions in the water to form CACO3, precipitating out of water to form limestone via sedimentation: dead organisms fall to ocean floor and break down into sediments

Question 7

Burial

Answer 7

Slow process and largest carbon reservoir (sedimentary Rock), including dead biomass that got fossilized and buried (fossil fuel)

Question 8

Extraction

Answer 8

Digging up/mining fossil fuels

Question 9

Combustion

Answer 9

Naturally happens : fires and volcanoes

Question 10

Direct exchange

Answer 10

Co2 moves directly b/w atmosphere and the ocean by dissolving into and out of ocean water at the surface