2. 1. Starch in
yoghurt?
We used three samples of
yoghurt. In each of them we put
several drops of iodine.
They didn’t turn blue-violet which
ment there is no starch in the
yoghurt milk.
Interesting:
Everyone can do this experiment
at home. Usually when the milk is
higher oiled there is starch in it.
3. 2.Dividing mixture
of salt and lens
First way:
We put the mixture in sieve. Under the sieve
there was a napkin. As expected the salt
went through the sieve and the mixture was
separated.
5. How much vitamin C contains:
• -orange juice squeezed 3 days ago?
• -fresh orange juice?
• -orange juice from a cartoon box?
6. Electric voltage produced by fruits
• Results:
• -orange - 0,050V
• -lemon – 0,051V
• -banana -0,056V
7. Relationship between nitrate and
chlorophyll in green leaves
• We used our math knowledge in reading a graphic and we estimated
that the more nitrate contains a leave the more chlorophyll it has
(they’re greener).
