Photosynthesis Lab

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Photosynthesis Lab
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Lab Objectives

• To explain and observe photosynthesis using
  spinach leaves
• To understand the methods and tools used in a
  simple experiment

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Materials

• Heat lamp
• Water/Baking Soda/Soap solution
• Spinach leaves
• Hole-punch
• Ruler

• Colored cellophane
• Cups
• Syringe
• Paper towels
• Timer
• Tape

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Procedures

• Collect materials.
• Record your two assigned colors of cellophane
• 2. Punch out 20 spinach discs using hole-punch.
• 3. Put 10 discs into each syringe barrel after
  removing plunger and tap until they get to bottom.

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Procedures Continued

• 4. Replace plunger and fill syringe with 6-8 mL
  of sodium bicarbonate solution. The leaf discs
  should be floating.
• Hold syringe upside down and expel air by
  depressing plunger carefully.
• Hold finger over tip of syringe and pull back on
  the plunger (not all the way). Release finger and
  repeat until no discs are floating. You have
  removed oxygen from leaf disc.

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• Empty discs into cup.
• Fill cup with 100 mL of solution.
• Put 4 inch by 4 inch square of cellophane over
  the top of the cup and tape it securely.
• Set cups 1 foot away from the bottom of the lamp.
• Turn lamp on and start timer.

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Procedures Continued

1. Record the number of floating discs in each cup
   after each minute that passes until all 10 discs
   are floating.
2. Turn lamp off. Empty cups into sink. Throw away
   spinach. Clean tables and put supplies back.

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Data

• Data table what should it look like?