Speaking topics in text
Bioluminescence
Bioluminescence occurs when organisms convert chemical energy into visible light. This happens when a chemical reaction involving oxygen and two other molecules takes place. During this reaction, light of varying colors may be emitted. The great majority of organisms that use bioluminescence are found deep in the oceans depths. This ability to produce light serves a variety of functions. Organisms may use it to do anything from escape their predators
Speaking recording
Votes
This speaking topic by users
| Post dates | Users | rates | Contents |
|---|---|---|---|
| Mon, 04/14/2014 - 14:20 | Ekhlass1980 | 80.00 | Check this speaking |
| Thu, 03/03/2016 - 21:17 | saramhl | 90.00 | Check this speaking |
| Mon, 04/14/2014 - 14:02 | Ekhlass1980 | 80.00 | Check this speaking |
| Fri, 11/08/2013 - 21:13 | Pinky123 | 85.00 | Check this speaking |
Speaking category
Speakings by user Pinky123
:
- . Who is the most intelligent person you know? Describe the person and say why you think he/she is intelligent. 77
- question 6 90
- Welcome Freshman Students As of September 1st unlike last year the university has decided to change its plan from holding freshmen orientation for all students it giving them the option of either going on a campus hiking tour or participating in games Thi 77
- question 6 85
- Erik Erikson In 1956, German psychologist Erikson used the term “identity crisis,” as being an important conflict human beings face in life. Erikson describes the identity crisis as first happening during ages 13 to 19. Overcoming the crisis in those tee 85
26 in 30
The second example is short.