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 |
---|---|---|---|
2014-04-14 | Ekhlass1980 | 80.00 | Check this speaking |
2013-11-08 | Pinky123 | 85.00 | 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
:
- What characteristics do you consider important in a friend? Use specific reasons and examples to support your answer. 70
- What area do you enjoy visiting most in your hometown? Why do you enjoy this location? Use specific reasons and details to support your answer. 10
- 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 80
- Q4 80
- Q4 70
23 in 30
Not good for last 15 seconds.