class for Friday

what do baby plants eat?

• bean extract - 20 beans and 50ml water - grind with mortal and pestle
• (might reduce to 5 beans and 12ml at a time)
• strain, using cheesecloth and funnel into beaker
• 1% starch solution ( at least 100mL for each 1g) - should be pretty close to clear
• CAN use blender to blend it!
• 3 test tubes
• one with 10ml starch solution ->5ml bean extract, 1drop iodine
• one with 10ml starch -> 5ml water, 1drop iodine
• one with 10ml water -> 5ml extract, 1drop iodine
• comes out (blue to white), blue, white in that order

Can use cracker lab to show this - grind up cracker, put in water, test for iodine, then have someone spit into it