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The ozonolyses of six monoterpenes (α‐pinene, β‐pinene, 3‐carene, terpinolene, α‐terpinene, and myrcene), two sesquiterpenes (α‐humulene and β‐caryophyllene), and two oxygenated terpenes (methyl chavicol and linalool) were conducted individually in Teflon chambers to examine the gas‐phase oxidation product and secondary organic aerosol (SOA) yields from these reactions. Particle size distribution and number concentration were monitored and allowed for the calculation of the SOA yield from each experiment, which ranged from 1 to 54%. A proton transfer reaction mass spectrometer (PTR‐MS) was used to monitor the evolution of gas‐phase products, identified by their mass to charge ratio (m/z). Several gas‐phase oxidation products, formaldehyde, acetaldehyde, formic acid, acetone, acetic acid, and nopinone, were identified and calibrated. Aerosol yields, and the yields of these identified and …