View the video below to see what you and your students will do in this lesson. Because substances are made up of different atoms and molecules, they react in characteristic ways. Production of a gas, ...

Students will be able to plan and carry out an investigation to compare the solubility of different substances, and develop and explain a particle-level model to describe the process of dissolving.

There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as ...

Hallucinogens, which have a different clinical profile than other commonly misused substances, required fewer quit attempts. Researchers also found that tranquilizers had a substantially higher ...

Podcast: Is there a single explanation that accounts for all addictive behaviors, or is the reality more complex? Under the Cortex explores.