HW AND MODEL ANSWERS CHAPTER 6 GRADE 4

Grade 4
CONGRATULATIONS YOU HAVE FINISHED THE REVISION SHEET


Chapter 6
(from page 20 to 22)
HW is answering the model exam

Q.1.DEFINE:
1-Humidity:
Is the amount of water vapor in the air.
2-Front:
Is the area where two air masses meet .
3- Air mass:
Is a huge body of air that has nearly the same temperature and humidity.

Q.2.COMPARE:
1-Cirrus clouds:
Are feathery clouds that form high in the atmosphere when water vapor turns into tiny crystals of ice .
-Stratus clouds:
Are flat layers of clouds that form close to Earth's surface.

2-Cold front :
It often brings strong winds and brief, heavy precipitation. It moves faster than warm fronts. It doesn't last for a long time .
-Warm fronts:
They usually move more slowly than cold front . They affect weather over larger area. They bring steady long-lasting precipitation .

Page 21
Q.3.GIVE REASON ;
1-Because air masses contain the water vapor that evaporates from the area below them so more water vapor will be evaporated from water than from land .

2- Because the density of cold air is greater than the density of warm air .

Q.4.TRUE OR FALSE :
1-t
2-t
3-t
4-f .from west to east

Q.5.COMPLETE :
1-land ,water
2-cool or cold, warm or hot.
3-strong winds ,precipitation .
4-front
5-Warm
6-slowly
7-cumulus,stratus and cirrus.
8-thick ,puffy ,good or fair ,high .
9- flat , close
10-feathery , high , tiny crystals of ice .


Page 22
Q.6.CHOOSE ;
1-d
2-d
3-c
4-c
5-b

GOOD LUCK
THANK YOU FOR YOUR EFFORTS