- Chert (Wikipedia)
Chert (/ˈtʃɜːrt/) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood.
- State of the Union (Wikipedia)
The State of the Union Address (sometimes abbreviated to SOTU) is an annual message delivered by the president of the United States to a joint session of the United States Congress near the beginning of most calendar years on the current condition of the nation. The State of the Union Address generally includes reports on the nation’s budget, economy, news, agenda, progress, achievements and the president’s priorities and legislative proposals.