MS-PS1-2
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
- Chemistry
Explainer: What are acids and bases?
These chemistry terms tell us if a molecule is more likely to give up a proton or pick up a new one.
- Earth
Explainer: Understanding geologic time
Geologic time is unimaginably long. Geologists puzzle it out using a calendar called the Geologic Time Scale.
- Chemistry
Explainer: How is water cleaned up for drinking
Unless you’re drinking well water, city folks typically get drinking water that has been treated in a water-treatment plant. Here’s what that means.
- Health & Medicine
Drug-detection system could help partygoers protect themselves
Fed up with people getting unwittingly drugged at parties, a teen designed a special bracelet. It can alert drinkers to the presence of certain hidden drugs.
- Health & Medicine
Science-fair finding allows girl to sample a croissant
Some supplements claim they can help people with celiac disease, who cannot digest gluten. But do the pills work? One teen used science to find out.
- Animals
Cool Jobs: Diving for new medicines
Scientists mix research with underwater adventure as they search the oceans for new chemicals to treat infections, cancer and more.
- Chemistry
Explainer: What are polymers?
Polymers, whether natural or artificial, are big molecules made by linking up smaller repeating chemical units. The most common “backbones” for polymers are chains of carbon or silicon, each of which can bond to four other atoms.
- Physics
Explainer: Quantum is the world of the super small
The word quantum often gets misused. What does it mean? Think small. Really, really small.
- Chemistry
Scientists Say: Catalyst
Sometimes a chemical reaction can take a while. If speed is needed, a catalyst can help.
- Chemistry
Trees can make summer ozone levels much worse
The greenery can release chemicals into the air that react with combustion pollutants to make ozone. And trees release more of those chemicals where it gets really hot, a new study finds.
- Chemistry
BPA-free plastic may host BPA-like chemical, teen finds
Something has to replace the BPA in ‘BPA-free’ plastics. A teen has been probing what that is.
- Health & Medicine
This mix turns pink when sunscreen wears thin
Many people know to put on sunscreen. Remembering to put more on is harder. A teen invented an indicator that glows pink when it’s time to reapply.
