| This activity
will help students understand how foods are rehydrated, and how much water
is needed to do this.
Obtain a ‘grow animal’ from
a toy store. They come in a variety of shapes and sizes.
Procedure:
1. Mass out the animal.
2. Record the mass in your
lab book.
3. Place the animal in a
large beaker of water.
4. Wait 24 hours.
5. Gently take the ‘animal’
out of the water and gently pat dry.
6. Mass out the ‘animal’,
and record the mass in your lab book.
7. Place the ‘animal back
in the beaker.
8. Repeat the procedure
again the next day.
Follow-up:
1. What was the mass of
the dry ‘animal’?
2. What was the mass of
the ‘animal’ after one day?
3. What was the difference
in mass between the dry ‘animal’ and the one soaked for one day?
4. What was the mass of
the wet ‘animal’ the second day?
5. Was there any change
in mass?
6. What do you think would
happen if you put the ‘animal’ in the beaker for a third day?
7. What is the percentage
of water weight gained by the ‘animal’?
Just for fun, try this with
a gummy bear or gummy worm candy. What are the differences?
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