TESTING FOOD FOR
STARCH
CARBOHYDRATES
• Store and provide energy
• Two types of carbohydrates
• Starch
• Sugar
STARCH
• a very large molecule
• numerous sugar molecules chained
together
• looks like a long twisted chain with many
branches sticking out
• starch + iodine = intense blue-purple
SUGAR
• When starch is broken down it produces
SUGAR
• Produced during the food-making process
that takes place in plants
• Sugar + iodine= no color change
MATERIALS
• Send one group member to get…
• Dropper filled with iodine. HOLD IT UPSIDE DOWN!!
• 2 goggles
• Send another group member to get…
• Plate, Orange, Apple, Potato, Bread, Cracker,
Cheese, Butter, Sugar
WHEN YOU ARE DONE, THROW PLATE
AWAY THEN ANSWER LAB QUESTIONS
RESULTS
FOOD
Apple
Orange
Cheese
Butter
Saltines
Sugar
Potato
Bread
STARCH PRESENT
STARCH NOT PRESENT