Step 12: Revise and submit your presentation. a) If you were unable to check off all the requirements on the checklist, revise your presentation
and save it before submitting.
b) When you have completed your presentation, return to the virtual classroom and use the
“Browse for file” option to locate and submit your assignment. Congratulations! You have
created a multimedia presentation.
c) Ask your teacher for further instructions about presenting your presentation to an audience of
your peers.
Resource Suggestions
You may wish to use these search phrases to look for online sources.
• World Health Organization – Food, genetically modified
• University of Utah Genetically Modified Foods
• GMO Fact Sheet: Pros vs Cons
• Genetic Foods
• New Plant Varieties

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

5.6⋅10−^19  j

do you need the explaination?