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 bio-luminescence 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 to find food.
Online speaking recording
Votes
This speaking topic by users
| Post dates | Users | rates | Contents |
|---|---|---|---|
| 2013-11-08 | Pinky123 | 85.00 | Check this speaking |
| 2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
| 2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
| 2016-03-03 | saramhl | 90.00 | Check this speaking |
Speaking category
Speakings by user Ekhlass1980
:
- eading Adaptive Reuse Over time many buildings become old run down and outdated They outlive their original purposes and become a burden for their communities Rather than spend a large amount of money to tear down these buildings and construct newer more 67
- Talk about a photograph or painting you have seen that was memorable? 70
- What job or career do you admire most, but not want for yourself? Use specific reasons and examples to support your answer 80
- Q3 70
- Some people prefer to have one long vacation. Other people prefer to have several short vacations. Which do you prefer? Use specific reasons and examples to support your answer. 70
23 in 30
Not good for last 15 seconds.