Scientists Say
A weekly word defined, in a sentence and in context. Click here to find the alphabetized list.
- Chemistry
Scientists Say: Cyanide
Cyanides are poisonous. But they are more than that. This group of compounds is used in everything from mining to capturing fish.
- Space
Scientists Say: Wormhole
Scientists have predicted the presence of tunnels in space that connect two points in space and time. They are named for the shape they resemble.
- Life
Scientists Say: Exocytosis
For a cell to remove something large from inside itself, it turns to a process called exocytosis.
- Chemistry
Scientists Say: Acidification
When a solution becomes more acidic, it’s acidifying. And that’s not always a good thing.
- Life
Scientists Say: Endocytosis
Small molecules can go into a cell through receptors or even just dissolve into it. But something big? That requires endocytosis.
- Physics
Scientists Say: Absolute zero
Even when we think it’s cold out, most molecules are moving. Only at absolute zero will all of their motions stop.
- Animals
Scientists Say: Copepod
Copepods are tiny crustaceans. They eat phytoplankton and float in the water column, although some live in freshwater and on the sea floor.
- Life
Scientists Say: Strain
These are organisms that belong to the same species, but have definable differences.
- Ecosystems
Scientists Say: Vector
Vectors are used to transfer things. Sometimes the transferred item is a disease, but scientists can also use vectors to insert helpful genes.
- Physics
Scientists Say: Frequency
The distance between one wave peak and another is wavelength. But how fast those peaks are moving along is frequency.
- Physics
Scientists Say: Yottawatt
On Earth, scientists measure energy use in watts. When you have lot of those watts — one million billion billion — you have a yottawatt.
- Physics
Scientists Say: Wavelength
When something travels as a wave — such as light — scientists can measure it by its wavelength, the distances between the peaks.
