MODULO CLIL
L’acqua e le sue proprietà
Water and its properties
Lesson 5 – Exercises
Autori:
Elisabetta Vagni
Patrizia Segoloni
Giuseppe Novello
1. THE SURFACE TENSION - OBSERVATION SHEET:
A FLOATING NEEDLE
Ex n°1
Insert the right names:
MATERIALS
a ………………………………………….
a …………………………………………..
a …………………………………………..
…………………………………………..
needle
some water
basin
sheet of tissue-paper
Ex n°2
Choose the correct word
PROCEDURE
Pour some……………………(water/ sheet of paper) into the……………...(needle /
basin)
Put carefully a little…………………………….(needle/ sheet of paper) on its
surface.
Put the……………………. (needle/ basin) on the sheet.
Take off the sheet slowly.
What happens?
Ex n°3
Thick the correct answer
When you take off the sheet of paper the needle
1. sink
2. doesn’t sink
3. disappear
Ex n°4
Fill in the gaps with the words below
The ………………..floats on the …………………… even if it has more specific
weight.
This phenomenon is called ……………………... It happens because water sticks
to each surface thanks to its force of …………………………. and also because it
holds its ………………….. strictly bound together thanks to the force of
…………………….
cohesion / adhesion / surface / molecules / needle / surface
tension
2. THE CAPILLARY ACTION - OBSERVATION SHEET:
THE SPONGE
Ex n°1
Insert the right names:
MATERIALS
a ………………………………..
a ……………………………….
……………………………………
some water
sponge
glass
Ex n°2
Choose the correct word
PROCEDURE
Pour some………………………….(glass/water) into
the………………………..(sponge/glass).
Put inside the glass a…………………... (sponge/ water).
Leave the bottom of the …………………….(glass/sponge) to soak for some
minutes in the …………..(glass/water).
What happens?
Ex n°3
Thick the correct answer
Which part of the sponge is wet?
1. Only the bottom of the sponge is wet.
2. The sponge isn’t wet.
3. All the sponge is wet.
Ex n°4
Fill in the gaps with the words below
This happens because the ……………….. is made up of very small ………………….
which allow ……………………. to climb thanks to its force of ……………………... This
is the phenomenon of …………………………..
adhesion / sponge / capillarity / particles / water
1. CAPILLARY TUBES - OBSERVATION SHEET:
Ex n°1
Insert the right names:
MATERIALS
some …..……………………….....................…….
some ………………………………......................….
some ….………………………………………………
a …………………………………………………………
a ………………………………………………………..
………….………………………………………………
colouring matter / water / capillary tubes of different diameter /
water / magnifying glass / transparent bowl
Ex n°2
Choose the correct word
PROCEDURE
Pour some………………………(water/capillary tubes) in
the…………………………..(transparent bowl/colouring matter)
Melt some………………………..(capillary tubes/colouring matter) into the water.
With the help of the teacher put vertically the……………………..( transparent
bowl /capillary tubes) into the water.
What happens?
Ex n°3
Thick the correct answer
Water inside the capillary tubes
1. rises
2. doesn’t rise
3. rises at the same level in each tube
Ex n°4
Fill in the gaps with the words below
The water inside the……………………. rises at a higher level than the water
inside the………………………. but the level of water in each tube is different.
The rising of the level of water into tubes with a very small……………………….
is named………………………….
The level of water is higher inside the tube with the smallest diameter
because there is more force of…………………………...
With the help of a…………………………. you can see that water tends to rise
near the walls of the tube making a………………………. This happens because
the…………………. of water have a strong tendency to adhere to the glass
thanks to the forces of…………………… and adhesion.
adhesion / capillarity / molecules / concave surface / cohesion
diameter / capillary tubes / bowl / magnifying glass
/
4.COMMUNICATING VESSELS - OBSERVATION SHEET:
Ex n°1
Insert the right names:
MATERIALS
two …………………………………………….....
a ……………………………………………………..
a ……….................................................
a ……….................................................
…………………… .......................................
pair of scissors / plastic bottles / water / glass
pipe
/
rubber
Ex n°2
Choose the correct word
PROCEDURE
Cut the bottom of the two …………………(bottles/ rubber pipe).
Turn them upside down.
Attach the ……………………………..(water/rubber pipe) to the openings of the
two bottles to connect them.
Pour some …………………..(bottles/water) into one of the two bottles then
lift it up.
What happens?
Ex n°3
Thick the correct answer
When you lift up one of the two bottles, the level of water:
2. is the same in both of the bottles
3. in not the same in the two bottles.
Ex n°4
Fill in the gaps with the words below
If we add water to………………………….. of different……………………… which
communicate at the bottom by a …………………………the water reaches the
same……………. in each vessel. An increase or decrease of water in any
vessel affects the……………………………. in all the others.
level / vessels / shape /
water /
tube
FIND THE ITALIAN TRANSLATION FOR THE FOLLOWING WORDS:
pour……………………………………....................................................................……………….
take off……………………………..............................................................……………………….
sink…………………......................................................................………………………………….
disappear……………………...........................................................……………………………….
float………………………...................................................................…………………………….
weight…………….................................................................……………………………………….
stick………………...................................................................…………………………………….
strictly ……….............................................................…………………………………………….
bound………….................................................................………………………………………….
bottom…...............................................................………………………………………………….
soak……………………...................................................................……………………………….
allow……………..................................................................……………………………………….
melt………..................................................................…………………………………………….
rise……...................................................................……………………………………………….
same…….................................................................……………………………………………….
each………..................................................................…………………………………………….
rising………................................................................…………………………………………….
higher (high) …………..................................................………………………………………….
wall………………………………...................................................................…………………….
cut……………………………...................................................................……………………….
attach……………...............................................................……………………………………….
openings…………...........................................................………………………………………….
lift………………....................................................................…………………………………….
increase………..........................................................…………………………………………….
decrease………........................................................…………………………………………….
affect………............................................................…………………………………………….