Speaking in Academic Contexts
Rhetorical Functions in Academic Speaking: Describing
Examples
Read the following descriptions:
Example 1
If you look at an octopus, it seems to be just a huge head with eight long, fearful arms. Its head is soft and rubberlike. Its eyes stick out on stalks so that it can see in all directions. Its mouth is on the underside of its body and has powerful jaws which are shaped like a beak. The long arms, or tentacles, have double rows of suckers. These can fasten onto objects with such suction that they cannot be pulled off. |
Example 2
The liver is the largest organ in the body. It weighs a little more than three pounds in an adult. It is shaped like a wedge and it is situated under the diaphragm, mostly on the left side of the body. There it is protected by the lower ribs. The liver is a little like an intricate chemical factory. It takes the particles of glucose – which come from digested starches and sugars – and changes them into another kind of carbohydrate called glycogen. It then stores the glycogen. When you need sugar in your body, the liver turns the glycogen into glucose again and sends it to the body tissues through the bloodstream. |
Example 3
The Leclanché cell consists of a leakproof jacket which contains a porous pot. In the pot there is a paste of manganese dioxide and carbon granules and this paste surrounds a carbon rod. The top can be sealed with pitch. There is a zinc rod standing in a solution of ammonium chloride, and this is connected to the carbon rod via a circuit and a light bulb . The zinc dissolves in the solution, and this sets up an electromotive force. The ammonium ions migrate to the carbon anode and form ammonia – which dissolves in the water – and hydrogen ions. We use wet paste cells of the Leclanché type in dry batteries for torches. |
Example 4
A 12-volt car battery has six two-volt cells and these are connected in series. The cells have anodes of brown lead oxide and cathodes of porous grey lead and these are immersed in sulphuric acid. If the electrodes are connected through a conductor, then an electric current flows. When the battery supplies current, the sulphuric acid converts the anode to lead sulphate, and this reduces the strength of the acid. When you are recharging, this process is reversed. Each cell of the battery is made of several anodes and cathodes and these are separated by porous insulators. The cells are housed in a hard rubber case and the various cells are interconnected with lead bars. |
Example 5
This is my Sony ICD MX 20 Digital Voice Recorder. As you can see it’s small and rectangular in shape. Actually it is 37 mm wide, 100mm high and 24 mm deep. It is made of aluminium, which is very strong and light. It weighs just 96g, that’s including the batteries. On the front, you can see, it has an LCD display – the display is about 25 mm square and it has a light – backlight – so that you can see it in the dark. On the front, there are also the controls and a small .28mm diameter loudspeaker. At the top it has a stereo microphone with a switch to make it more directional and long distant. On the left-hand side here it has earphone and microphone jack sockets. On the right hand side it has a Sony Memory Stick PRO Duo slot and a USB connector to allow you to transfer your recording to and from a PC. This means that I can change the memory card if I need to so, as I said, the amount I can record is unlimited. It uses a Sony Memory Stick PRO Duo card and at the moment, I have a 2GByte card in now. With the 2GByte card I can record up to 750 hours or, if I set it to best quality, as I usually do, 92 hours. That’s perfectly enough for what I need. You can see also that it has a volume control on the right hand side. At the bottom of the recorder, there is a battery container and a socket for an external power supply. It uses 2 standard type AAA batteries, and they last for 17 hours playing or 8 hours recording. |
Example 6
NEWCOMEN’S STEAM – ATMOSPHERIC PUMP
In 1712, he’d built a pump, a steam-driven pump for pumping water out of the tin mines in south west England. Newcomen’s pump, as you can see, had two main parts, and these were positioned on either side of a wall. There was a pump mechanism on one side of the wall and a simple engine on the other side of the wall. These two parts were connected by a large pivoted beam. Attached to each end of the beam was a piston on a chain. The pump piston hung down inside a mine shaft, while the engine piston sat inside a cylinder, and this was mounted on top of a boiler. Above the cylinder was a tank containing cold water. |
Language
Position, weight, structure, colour, composition, size, shape, function
Position
A is |
adjacent to |
B |
between |
B and C. |
Structure
X |
is |
nailed |
to |
Y |
by |
Z |
consists |
of |
Y and Z |
||||
contains |
||||||
is |
held in place |
by |
Y |
|||
joined |
to |
|||||
mounted |
on |
Colour
X |
is |
dark |
green. |
Composition
X |
is |
made of |
metal. |
Size and weight
X |
is |
6 cm |
long |
X |
is |
6 cm |
in |
length |
6 Kg |
weight |
The |
length |
of |
X |
is |
6 cm |
weight |
6 Kg. |
X |
has |
a |
length |
of |
6 cm. |
weight |
6 Kg. |
X |
weighs |
10 Kg |
Shape
X |
is |
square |
in shape |
X |
is |
is shaped like a |
square |
X |
is |
cubical |
in shape |
X |
is |
bulbous |
in shape. |
diamond-shaped |
. |
Function
The |
function |
of the |
thermometer |
is to |
measure the temperature. |
The |
thermometer |
is used for |
measuring the temperature. |
Properties
X is |
light |