Week Two Lab Quiz

Which of the following items is NOT required for the lab experiment?

• Iodine

• A large mason jar

• A measuring cup

• A plastic baggie

Why is it important to use inexpensive plastic bags for this experiment?

• They are more environmentally friendly

• They allow better visibility of the contents

• They are easier to seal

• They are more permeable to iodine

What is the first step in the experiment procedure?

• Add corn starch to the plastic bag

• Add iodine to the water in the mason jar

• Submerge the bag in the jar

• Twist the baggie around the paperclip

What safety precaution should be taken when handling iodine?

• Wear gloves to avoid staining

• Ensure it does not come into contact with metal

• Keep it away from direct sunlight

• Store it in a refrigerator

What scientific concept does this experiment demonstrate?

• Semi-permeability

• Diffusion

• Osmosis

• Photosynthesis