1. Word Roots How to build a science vocabulary

2. A. Science Vocabulary ► 1.) Words are invented as they are needed. When a scientist makes a new discovery a new word is made to describe it.

3. 2. Science words are usually made from combinations of ancient Greek or Latin roots, prefixes, or suffixes.

4. a) A root is the main part of a word b) A prefix is a word part at the front of a word c) suffix is a word part at the end of a word

5. B. Examples of root words: Example 1 The root cyto - or - cyte means cell. - ology means the study of … If the two roots are combined... If the two roots are combined... Cytology means “the study of cells.” Cytology means “the study of cells.”

6. Example 2 1) The root “-bio” means life The word biology means the study of life

7. Example 3 1) The root “lysis” means to burst 2) The root “-cyto” means cell In a process called cytolysis a cell bursts.

8. Other examples…. -tomy means to cut appendectomy – surgery to cut out the appendix -path means disease pathogen - organism that causes disease

9. Try these: 1.) What is a pseudopod if pseudo means false and pod means foot? if pseudo means false and pod means foot? 2.) What is a microscope if micro- means very small and –scope means instrument to see something

10. C. Why learn root words? ► If you know the meaning of a word root it is possible to determine the meaning of a word. The same root may be used for many words.

11. For example… Using the suffix “-ology”: 1. Biology is the study of life. 2. Cytology is the study of cells. 3. Embryology is the study of early development.

12. Try this: Which of the words on the right means the study of living things and their environment? a) homeostasis b) ecology c) metamorphosis

13. Try this: Which of the words below means the study of disease? a) biology b) ecology c) pathology

14. Try this: ► Do you remember what the root “- cyte” means? ► If erythro- means red, what is an erythrocyte?

15. Perfect! ► An erythrocyte is a red blood cell.