ANNOUNCEMENT IN PLANE

We will learn about :

• Airplane parts and functions;

• Suppose that you are a stewardess or steward how make an announcement about safety demo in flight to your passenger with correct grammar

READING SKILL

Read the text below ! the following text is for questions 1-6 !

Wind power converts the kinetic energy in wind to generate electricity or mechanical power. This is done by using a large wind turbine usually consisting of propellers; the turbine can be connected to a generator to generate electricity, or the wind used as mechanical power to perform tasks such as pumping water or grinding grain. As the wind passes the turbines it moves the blades, which spins the shaft. There are currently two different kinds of wind turbines in use, the Horizontal Axis Wind Turbines (HAWT) or the Vertical Axis Wind Turbines (VAWT). HAWT are the most common wind turbines, displaying the propeller or ‘fan-style’ blades, and VAWT are usually in an ‘egg-beater’ style.

Wind is converted by the blades of wind turbines. The blades of the wind turbines are designed in two different ways, the drag type and lift type.

• Drag type: this blade design uses the force of the wind to push the blades around. These blades have a higher torque than lift designs but with a slower rotating speed. The drag type blades were the first designs used to harness wind energy for activities such as grinding and sawing. As the rotating speed of the blades are much slower than lift type this design is usually never used for generating large scale energy.

• Lift type: most modern HAWT use this design. Both sides of the blade has air blown across it resulting in the air taking longer to travel across the edges. In this way lower air pressure is created on the leading edge of the blade, and higher air pressure created on the tail edge. Because of this pressure difference the blade is pushed and pulled around, creating a higher rotational speed that is needed for generating electricity.

To create electricity from wind the shaft of the turbine must be connected to a generator. The generator uses the turning motion of the shaft to rotate a rotor which has oppositely charge magnets and is surrounded by copper wire loops. Electromagnetic induction is created by the rotor spinning around the inside of the core, generating electricity.

The electricity generated by harnessing the wind’s mechanical energy must go through a transformer in order increase its voltage and make it successfully transfer across long distances. Power stations and fuse boxes receive the current and then transform it to a lower voltage that can be safely used by business and homes.

1. What is the main idea about the text ?

1. How wind power works
2. How the kinetic energy in wind to generate electricity or mechanical power
3. How turbine works
4. How the electricity work in wind power

2. What is the characteristic of the blades of the wind turbines design Drag type ? Except..

1. The drag type blades were the first designs used to harness wind energy for activities such as grinding and sawing.
2. Both sides of the blade has air blown across it resulting in the air taking longer to travel across the edges.
3. As the rotating speed of the blades are much slower than lift type this design is usually never used for generating large scale energy.
4. This blade design uses the force of the wind to push the blades around.

3. Based on the text, what is the function of generator ?

1. to rotate a rotor which has oppositely charge magnets and is surrounded by copper wire loops
2. created by the rotor spinning around the inside of the core, generating electricity
3. increase its voltage and make it successfully transfer across long distances
4. created on the leading edge of the blade, and higher air pressure created on the tail edge

4. Where is the part that created lower air pressure ?

1. on the tail edge
2. on the leading edge of the blade
3. on the blade edge
4. on the turnbine

5. What will happen when the wind passes the turbines ?

1. pumping water or grinding grain
2. spinning around the inside of the core
3. it moves the blades, which spins the shaft
4. through a transformer in order increase its voltage

6. Why Drag Type is usually never used for generating large scale energy ?

1. Because taking longer to travel across the edges
2. Because a slower rotating speed
3. Because using a large wind turbine
4. As the rotating speed of the blades are much slower than lift

SPEAKING SKILL

Intructions :

Your teacher will show a video about safety demo by stredwarss and steward, watch it seriously. Suppose that you are a stewardess or steward make an announcement about safety demo in flight to your passenger. Please be nice actor or actress, and deliver the information with your body language. You will divide into 5 groups and you will performance in your group, your teacher will check your performance one by one while you do it. Use your notes to make announcement to your classmates. 

Safety Demonstration :

• How to use seat belts, oxygen masks, emergency doors and windows, life jackets, and safety cards.
• How to lock your seat belt, tighten, and release your seat belt.  
• The MD-90 plane is equipped with eight emergency doors and windows, two emergency exits in the front cabin, four emergency windows in the center of the cabin, and two emergency exits in the rear cabin.
• Your life jacket is under the seat and is only worn during an emergency landing in the water, please do not take it home.
• In the chair pouch in front of you has available instruction cards on ways to save yourself in an emergency.

Warm Up

Teacher greet. 

Teacher tell the topic.

Teacher give some example about kinds of announcement in plane

direction 1: teacher ask the students to identity kinds of announcement

direction 2 : the students can mention parts of plane

direction 3 : the students can announce if they suppose be a stewardess or steward

The students can identyfying the differents kinds of announcement and how to speak announce to people and understanding parts of plane with each functions,