Change in State: Melting of ice into water and freezing of water into ice are physical changes because the chemical composition of water (H₂O) remains unchanged. Changes in Shape or Size ...

The four fundamental states of matter are solid, liquid, gas and plasma, but there others, such as Bose-Einstein condensates and time crystals, that are man-made.

In conversation with Mále Uribe, we set out to learn about the processes and ideas that work at the intersection of art, ...

Show the animation Conservation of Mass in Physical and Chemical Changes. Explain that whether a process involves melting, dissolving, or a chemical reaction, all the atoms that were there before the ...

Frequent forest fires and agricultural expansion are degrading soil health in the southern Brazilian Amazon. This results in ...

OverviewResearchers in chemical physics apply physical methods and theory to study molecular and collective properties of chemical systems. The focus is on understanding complex phenomena from gas ...

Chemical sunscreens, compared to physical ones, cause more adverse reactions in the skin because of chemical changes in their molecules. In addition, some chemical filters, such as ...

Mineral sunscreens, made with titanium dioxide or zinc oxide, are becoming a popular choice. Unfortunately there are a lot of misconceptions about how mineral sunscreens work, and whether they are ...