Mrs. Martin uses a bell ringer while Mr. Bogart does not. Bell ringers are questions or tasks posted before students enter the classroom. They are to be completed before class starts, or, as the name suggests, as the bell rings. Despite potentially having an elementary connotation, bell ...
Hernandez, Kristina
Compounds A substance made of two or more elements that are chemically combined in a set ratio Ex: Water (H2O), ammonia (NH3), and carbon dioxide (CO2) So, in water, there are always 2 hydrogens to 1 oxygen But what is a substance? A substance that cannot be broken down into any ...