METHOD: HOW TO PRESENT A TECHNICAL SYSTEM ORALLY
Today, we will learn how to present the barometer you have studied in the technology class.
FIRST: Say what the function of the system is.
The function of this system is to + V…
SECONDLY: Name the different parts of the system.
This system is composed of … parts. There is … This system is composed of many parts and
we will focus on the main (=most important) components.
Show the different parts on the diagram as you’re naming them.
THIRDLY: Explain how the system functions.
Here is a list of useful words to present the barometer. Work in pairs to make sentences to explain how the system functions.
Verbs: Expand – contract – push – rotate along – make… turn – be attached to – to magnify Nouns: Device – tooth/teeth – pinion = gear – motion – rotation ‐ axle
Adjectives: Linear – first – second – triangular
TO FINISH: Add extra information.
Read the following text and underline elements worth mentioning in an oral presentation.
What does it mean when a barometer is rising or falling?
A barometer measures air pressure: A "rising" barometer indicates increasing air pressure; a "falling"
barometer indicates decreasing air pressure.
In space, there is a nearly complete vacuum so the air pressure is zero. On Earth, because there are many miles of air molecules stacked up and exerting pressure due to the force of gravity, the pressure is about 14.7 pounds per square inch at sea level.
The interesting thing about air pressure is that it is different at different points on the planet and it changes over time. Why might that be? If you've read How Hot Air Balloons Work, you know that
hot air is less dense (lighter) than cooler air. Therefore, on any given day you would expect the air over a desert to have a lower pressure than the air over an ice cap. And that would be true.These same sort of pressure differences occur all over the planet for various reasons.
These pressure differences have a big effect on the weather, so if you know the current air pressure at your house, as well as the pressure trend, you are able to predict certain things about the weather. As a very loose rule, a high-pressure area will be clear, and a low-pressure area will be cloudy and rainy.
Source: http://www.howstuffworks.com/
