Gummy Bears Osmosis

Gummy Bear Osmosis

Aim:

I want to find out what happens to Gummy Bears when we put them into different liquids.

Prediction:

I think that the Gummy Bears will absorb the liquids.

Method:

  

Equipment:

• Three solutions - water, sugar and salt

• Four Gummy Bears of the same colour

• Two Petri Dishes

• Marker pen

• Electronic Balance

• Measuring Cylinder

• Beaker

Steps

1. Get your equipment.

2. Put on your safety glasses

3. Label Petri dishes with DRY, WATER, SALTWATER, SUGAR WATER

4. Weigh the Gummy Bears and record their weight on the Petri Dish.

5. Add 40mL of the solution into the Petri dish.

Findings:

Weight change

Water Absorbed by Gummy Bear

How many mL left in the petri dish?

Water Absorbed by Gummy Bear?

Why did the dry gummy bear lose weight?

Why did the normal water gummy bear absorb more water?

Why did the sugar water gummy bear absorb less water?

Osmosis - what does this word mean?

Gummy Bear: 5.43g

Definitions:

Diffusion: The Movement of any substance from a higher concentration to a lower concentration.

Osmosis: The movement of liquids or gases through a semi-permeable membrane.

Chart: Weight Change

	Dry	Water	Saltwater	Sugar water
initial weight of Gummy Bear	5.43g	5.43g	5.43g	5.43g
Final Weight of Gummy Bear	4.43g	3.56g	4.56g	6.13g
Weight Difference	0g	-1.87g	-0.87g	0.60g
Initial Volume	40ml	40ml	40ml	40ml
Final Volume
Volume Difference

Conclusion:

The dry gummy bear lost weight and was light after 6 days.

The gummy bear in the normal water lost 1.87g in 6 days.

The gummy bear in the saltwater lost 0.87g in 6 days.

The gummy bear in the sugar water gains 0.60g in 6 days.