effervescence

"The children were excited to go to their classroom in the morning. "

"The soda was very carbonated, making it fizz a lot when I opened the bottle. "

"The vivacity of the young children playing in the park was contagious. "

"The chemistry experiment showed that carbon dioxide, a gas we exhale, contains two oxygen atoms for every carbon atom. "

"My sister is very helpful, especially when it comes to organizing things. "

"The student's enthusiasm for history was a form of divine inspiration, making him memorize facts effortlessly. "

"Everyone in the class needs to bring their textbook to the first lecture. "

"Foreign governments have tried to foment unrest."

"My discussion with the professor was very enlightening."

"The lemonade was a clear solution of lemon juice and water. "

"The difference in her haircut was noticeable immediately. "

"The flu was so contagious that everybody in town got sick!"