Scientists Say
A weekly word defined, in a sentence and in context. Click here to find the alphabetized list.
- Physics
Scientists Say: Acceleration
Acceleration is a change in velocity. That could mean a change in speed or in direction.
- Physics
Scientists Say: Radiation
Radiation is the motion of energy through space as waves or particles.
- Brain
Scientists Say: Neuron
Neurons are the foundational cells in the nervous system. They pass along and process information using electrical signals.
- Fossils
Scientists Say: Hominid
Scientists are still working out what counts as a hominid. Some say it’s just people and our extinct ancestors. Others say add more apes.
- Animals
Scientists Say: Egg and sperm
An egg or a sperm cell contains half of the normal genes an organism needs. They fuse together to form a new individual.
- Climate
Scientists Say: Weather
The state of the atmosphere in a specific place and time is weather. Over a long time, the weather conditions in an area will reveal its climate.
- Planets
Scientists Say: Planet
Planets have to orbit a star, be big enough to form a sphere and keep other objects out of their path around their star.
- Math
Scientists Say: Outlier
Data points often fall within a normal range. When one data point sticks out a lot, it might be an outlier.
- Animals
Scientists Say: Organelle
An organelle is a part of a cell with a particular function. Like organs. But for cells.
- Physics
Scientists Say: Piezoelectric
Piezoelectric materials produce an electric voltage when they are bent or squished. This can let us harvest electricity from movement.
- Health & Medicine
Scientists Say: Body Mass Index
This is someone’s weight in kilograms divided by the square of their height in meters. But it’s not a measure of someone’s health.
- Chemistry
Scientists Say: Molecule
A molecule is a group of atoms linked with chemical bonds. It’s the smallest particle of a substance that has all of its chemical properties.
