Explanation text : Planes

Soal Latihan Ujian Nasional Beserta jawaban:

All planes need air to pressure under their wings to stay up in the air. As they move forward. The higher air pressure underneath their wings pushes them upward and gives them lift.

The smooth, streamlined shape of the plane allows the air to flows easily over its surface. This helps to reduce the drag caused by the air pushing against the plane and allows it to move rapidly through the air.

Planes move forward using engines. This movement is called thrust. Moving forward keeps a stream of moving air passing over the wings. If the engines fail, theplanes will begin to descend very quickly.

The air above the wing moves faster, so it is at a lower pressure than the air under the wing.
The air under the wing moves more slowly and is slightly squashed, so it is at a higher pressure than the air above the wing.

1.      What does the text describe?

A.  how the wings of a plane work                                         D. how the plane move forward

B.   how the plane is made                                                      E. the engine of a plane

C.   how a plane flies

2.      “This helps to reduce the drag caused by the air pushing against the plane and allow it to move more rapidly through the air”(Paragraph 2) the underlined word can be replaced by....
A. slowly                   B. quickly                    C smoothly                  D. gradualy           E. immediately

3.      Movement planes forward using engines is called....
A. trust                      B. thurst                       C. Squash                    D. thrust               E. streaming

4.      “.....the planes will begin to descend very quickly” underlined word means..
A. go over                 B. go up                       C. landing                    D. starting            E. ending

5.      Which statement is false accroding the text..
A. all planes need air to presure under their wings to stay up in the air

B.   streamlined shape of the plane allows the air to flows easily over its surface

C.    planes move forward using engines

D.   moving forward keeps a stream of moving air passing over the wings

E.   planes movement forward is calling as streamlined.

         6.      The air under the wing moves more slowly and is slightly squashed, so...

A.it is at a lower pressure than the air under the wing.                      

B. it is at a higher pressure than the air above the wing.

C. allows the air to flows easily over its surface

D.a stream of moving air passes over their wings

E. the wings move forward