Backpack? Check. Notebooks and pencils? Check. Coronavirus test? Check.
This fall, many kids and teens have left Zoom school behind and returned to the classroom. To keep them safe, the U.S. Centers for Disease Control and Prevention, or CDC,...
School probably felt different for you last year. Maybe you stayed home, learning and hanging out with friends only through screens. Perhaps you went to class in person, masked and stayed six feet (1.8 meters) apart.
“Close contact” quarantines...
aerosol: (adj. aerosolized) A tiny solid or liquid particle suspended in air or as a gas. Aerosols can be natural, such as fog or gas from volcanic eruptions, or artificial, such as smoke from burning fossil fuels.
atmosphere: The...
algae: Single-celled organisms, once considered plants (they aren’t). As aquatic organisms, they grow in water. Like green plants, they depend on sunlight to make their food.
Arctic: A region that falls within the Arctic Circle. The edge of that...
