Team №1Direction:Science

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.

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.

2.Dividing mixture of salt and lens

• Second way

How much vitamin C contains:

• -orange juice squeezed 3 days ago?• -fresh orange juice?• -orange juice from a cartoon box?

Electric voltage produced by fruits

• Results:• -orange - 0,050V• -lemon – 0,051V• -banana -0,056V

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).