Listed below is a collection of some of the most important science vocabulary words used in our class. This page is updated periodically, so be sure to refresh your browser every now and then. If you don’t see a word you are looking for, try visiting Merriam-Webster’s Learner’s Dictionary (a dictionary for younger science students) or any of the online dictionaries recommended by Dr. Merritt.

ABCD | EFG | HIJK | LMNOP | QRS | TUV | WXY&Z | 123s | Roots


  • TERTIARY CONSUMER: an animal that feeds mainly on secondary consumers in a food chain or web.
  • TESTA (or SEED COAT): the outermost layer of a seed. It helps protect the inner part of the seed from other living organisms (e.g., insects and bacteria) and non-living factors (e.g., cold temperatures).
  • TISSUE: an ensemble (aggregate, assemblage) of similar cells from the same origin that together carry out a specific function. Different types of tissues can be found in both animals and plants.
  • TREND: a general direction in which something is developing or changing.
  • TRUE LEAVES: usually green, flattened structures attached to a stem and functioning as a place where photosynthesis and transpiration occurs in most plants.


  • USABLE ENERGY: energy able to be used by (for example) humans, mushrooms, bacteria, plants, machines, etc. to do work, to make things happen, to cause changes. Energy that is not usable is called unusable energy.


  • VACUOLE: a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. Present in all plant and fungal cells, and in some protist, animal, and bacteria cells, vacuoles typically contain water molecules and other types of molecules (e.g., food molecules, waste molecules, etc.).
  • VOLUME: the amount of space occupied by a substance or object. Or, the amount of space enclosed within a container.
  • VOLT

ABCD | EFG | HIJK | LMNOP | QRS | TUV | WXY&Z | 123s | Roots

Last updated: July 2019

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