Science Experiment

Experiment #3 Bring Back The Substances

Here’s what you’ll need:

•2 tablespoons of flour

•2 tablespoons of salt

•Clear drinking glass,washed and dried

•Clean spoon

•Hot tap water

•Coffee filter

•Wide-mouthed jar

•Rubber band

•Shallow dish

Instructions

1.  Add the flour and salt into the glass.  Stir well to mix them.
2.  Fill the glass with hot water.  Stir well.  Let the glass sit for 20 min.
3.  Collect a spoonful of water and taste it.  
How does it taste? Very Salty
 What happened to the flour?  It sunk to the bottom
4.  Put the coffee filter.  Hold the sides and attach with an elastic.
5.  Stir the mixture to put back the flour back into suspension.  Pour slowly to allow water to pour through the filter.
6.  Pour some of the liquid into a shallow dish.  Put the dish in a sunny spot.  What do you see once all the water is done.  Salt particles

Hypothesis
The water will evaporate and leave the items that didn't get filtered in the dish.


Conclusion
Salt dissolved into the hot water and when you put it in the coffee filter it filtered out the flour but since the salt was dissolved, it was able to pass through the coffee filter.  When you put the dish out in the sun, the salt particles were able to re-join.