Recently, we heard about an attractive floor finish called “acid stain,” which is applied directly over a previously unfinished concrete slab. It’s said to be easy to care for. Acid stain is not paint ...

Acids and bases are classes of materials that have different properties. Acid-base indicators change color depending on whether they are in acids or bases. Blueberries contain a substance called ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Stable, color-changing compound shows potential for electronics, sensors and gas storage. A research team led by Hokkaido University in Japan have constructed a porous material that is very stable and ...