From: Subject: Today we are going to learn something about Hot Balloons Date: Thu, 29 Sep 2005 11:59:08 +0200 MIME-Version: 1.0 Content-Type: text/html; charset="windows-1255" Content-Transfer-Encoding: quoted-printable Content-Location: file://C:\Documents and Settings\ophir\Desktop\amalbcom\amalbcomold\Activities\balloons.htm X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Today we are going = to learn something about Hot Balloons

Today we are going = to learn=20 something about Hot Balloons

 

Type in : http://www.hows= tuffworks.com/hot-air-balloon.htm

 

 

Read the text: How = Hot Air=20 Balloons Work

 

Answer the=20 questions:

 

1.     =20 Is (according to = the text) a=20 hot air balloon?

a.     =20 practical=20

b.     =20 the=20 opposite

 

2.     =20 What does the word = : "=20 serene" in para. 1?

 

a.     =20 happily

b.     =20 calm

c.      =20 unpleasant

d.     =20 severe

 

3.     =20 Cool air=20 is

 

a.     =20 lighter than hot=20 air

b.     =20 easier than hot = air=20

c.      =20 heavier than hot=20 air

d.     =20 none of the=20 above

 

4.     =20 How much cubic = foot of air=20 would we need if 2we wanted to lift 5,000 = pounds?

5.     =20 How many parts = does a=20 balloon have?

 

a.     =20 two

b.     =20 three

c.      =20 one

d.     =20 none of the=20 above

 

6.     =20 Explain the word: = "=20 compressed".

7.     =20 What does the hose = do?

 

a.     =20 plays the=20 game

b.     =20 dries up that=20 cylinder

c.      =20 put the liquid in = the=20 basket

d.     =20 both a &=20 b

 

8.     =20 What is the " = heating coil"?=20 Explain.

9.     =20 When does the = propane change=20 into gas?

10.  = What is a gore?=20 Explain.

11.  = Why do they say " = nylon=20 works well in ballons?. Because:

 

a.     =20 it is=20 transparent

b.     =20 it doesn't weigh=20 much

c.      =20 it is=20 strong

d.     =20 both b &=20 c

 

12.  = What is the other = name for=20 the " nylon"?

13.  = What does the word = :"=20 buoyancy" mean?

 

a.     =20 bureaucracy

b.     =20 keeping things=20 floating

c.      =20 predicting

d.     =20 none of the=20 above

 

14.  = When will the = balloon=20 continue going up?

15.  = Explain in your = own words=20 what a balloon envelope is.

16.  = Why should the = basket be=20 flexible?

17.  = PILOTING:

 

 Make up a list of devices and = their=20 functions while piloting a balloon.

 

18.  = What is the role = the wind=20 and the weather play in piloting a balloon?

 

 

If you have the = time and hat=20 a bonus J go on=20 reading:

 

 Launching and=20 Landing

 

Make up a list of = commands=20 in their order.

 

Enjoy!