Scientists Say

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

  1. Space

    Scientists Say: Gas giant

    These gargantuan planets, such as Jupiter and Saturn, are mostly made up of hydrogen and helium gas.

  2. Earth

    Scientists Say: Glacier

    Glaciers are massive ‘rivers of ice’ that move slowly over land. But climate change is shrinking them.

  3. Health & Medicine

    Scientists Say: Outbreak, Epidemic and Pandemic

    These terms can describe what is happening as a disease spreads across communities, countries and the world.

  4. Physics

    Scientists Say: Decibel

    A decibel is a unit of measurement that describes a sound’s volume. It’s used for sounds that are in the range of human hearing.

  5. Ecosystems

    Scientists Say: Estuary

    This is where a freshwater river meets a salty sea. This environment has brackish water, a mix of saltwater and freshwater.

  6. Physics

    Scientists Say: Quark

    These subatomic particles are the building blocks of bigger particles, including the protons and neutrons found in an atom’s nucleus.

  7. Animals

    Scientists Say: Herbivore

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

  8. 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.

  9. 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.

  10. 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.