Photosynthesis: plants use sunlight, water, and CO2 to make glucose and release oxygen.


Fractions: the top number counts parts and the bottom number shows total equal parts.


Water cycle: evaporation turns liquid water into vapor; condensation forms clouds.


Precipitation returns water to land and bodies of water as rain, snow, sleet, or hail.


AI agents observe state, decide actions, and update plans using tools and memory.


American Revolution: colonists protested taxation without representation and trade restrictions.


Boston Tea Party: colonists dumped tea to protest the Tea Act in 1773.


Enlightenment ideas about rights and consent spread through pamphlets and speeches.


One-half means one of two equal parts; one-fourth means one of four equal parts.


Runoff carries water from land back toward rivers, lakes, and oceans.