Geologists investigated the rock layers in the canyon to determine the sequence of ancient volcanic eruptions that shaped the region.
地质学家调查了峡谷中的岩层，以确定塑造该地区的古代火山喷发顺序。
Which choice best defines “investigate”?
B — Examine, look into. “investigate” means examine, look into.
Which word means “examine, look into”?
D — investigate. “investigate” means examine, look into.
investigate — examine, look into. In Chinese: 调查，研究.
investigate is pronounced /ɪnˈvestɪɡeɪt/.
Geologists investigated the rock layers in the canyon to determine the sequence of ancient volcanic eruptions that shaped the region. (地质学家调查了峡谷中的岩层，以确定塑造该地区的古代火山喷发顺序。)
examine, probe, scrutinize — all close in meaning to investigate (examine, look into).
ignore, overlook — each the opposite of investigate (examine, look into).
Yes. investigate is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
investigate(investigate)