Projects
Pressure!
Fizz egg!
Put an egg th
at’s been coo
ked
in its shell in
a container a
nd
cover it with
vinegar. Wha
t happens?
The bubbles y
ou’ll see are
a gas called
carbon dioxid
e. Vinegar ha
s a type of
acid in it that
breaks down
the eggshell’s
layer, which is
made of a min
eral called
carbonate.
Leave the egg
for four days
.
What has hap
pened
to the eggshe
ll?
get sucked
See a n egg
le:
into a bott
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m
o
.c
s
k
r
spa
ing-a irinvestigat
ore-eggs/
pressure-m
Messy
Experiment!
Can you drop a
n egg
without it sma
shing?
You’ll need an
adult for this.
Put one uncook
ed egg in its shel
l
in a resea lable
plastic bag and
fill the
bag ha lf way w
ith cold water.
Put another un
cooked egg in it
s shell
in a resea lable
bag w ith cerea l
or flour.
Fasten both bags
!
Place a bin liner
or a plastic shee
t
on the floor (tip
: you might wan
t to
do this experim
ent outdoors.)
Drop the bags.
W hat happens?
SPARK
3