Scientists Say

A weekly word defined, in a sentence and in context.

  1. Animals

    Scientists Say: Herbivore

    Herbivores are animals that can live on a diet of mostly plants.

  2. Earth

    Scientists Say: Firewhirl and Firenado

    Firewhirls are smallish vortices of ash and flame; firenadoes are true twisters set off by the conditions that come with a wildfire.

  3. Life

    Scientists Say: Nutrient

    Nutrients provide living things, from bacteria to animals, with the energy and materials to grow. But too much of a nutrient can sometimes cause harm.

  4. Animals

    Scientists Say: Papillae

    These small nubs stick out from a body part. They include things such as tongue bumps with taste buds and the structures under the skin that help grow hair.

  5. Scientists Say: Octopod

    These marine animals have soft bodies and eight sucker-lined arms. Some are known for their smarts or ability to quickly change colors.

  6. Physics

    Scientists Say: Power

    This word describes the rate at which energy is delivered or used to do work, along with related ideas, such as ways of making electricity.

  7. Animals

    Scientists Say: Species

    This word describes organisms grouped by their similarities in genetics and physical traits. But defining species can be tricky.

  8. Space

    Scientists Say: Black hole

    This is an object in space with such a strong gravitational pull that nothing, not even light, can escape

  9. Scientists Say: Hypothesis

    A hypothesis is an idea that scientists propose, then study and explore, to explain phenomena in the natural world.

  10. Fossils

    Scientists Say: Paleontology

    This is the study of prehistoric life based on fossils of microbes, plants, and animals found in rock.