Gummy Bear Lab : Observing Osmosis

This hypothesis is based off of the idea of water density and how it changes when a substance is added or removed. A material's density is defined as its mass per unit volume. It is, essentially, a measurement of how tightly matter is crammed together (Jones, 2015). Every matter in the world has its own specific density. Density can be calculated by multiplying the mass times the volume. Water's density can change when a substance is added or when the temperature is increased or decreased with the normal density of water is just under 1 gram per

The results of this lab shows how osmosis, diffusion, hypertonic, and hypotonic solutions. One way the gummy bear shows osmosis in gummy bears is how the gummy bear in the water solution grew the most. This gummy bear grew the most because the solution had a higher concentration, this in turn caused the solution to begin equalizing the concentration on each side

The purpose of this lab was to save a little gummy worm named Sam from drowning. In addition, one of the labs key terms was a hypothesis which is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Furthermore, we also learned that an independent variable is a factor that is changed during the experiment. On the other hand, the dependent variable is the factor that is observed or measured during the experiment. To begin with, the experiment the hypothesis formulated was if we reshape the paperclips into hooks and pick up sam, and the lifesaver (without touching them), then the lifesaver would be stretched enough for Sam to go through it.

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached. Osmosis, however, is the movement of water according to its own concentration gradient across a selectively

After completing this experiment, our tap water hypothesis was correct, and our saltwater hypothesis was also proven. For the tap water, the gummy bear expanded as we thought it would. This was because of osmosis. The water outside of the bear diffused into the bear from the higher concentration outside into the lower concentration inside of it. The gummy bear was a selectively permeable membrane. This made a hypotonic solution, and the water rushed into the bear, making it get bigger. For the salt water, the bear shrunk as we predicted, also because of osmosis. This was a hypertonic solution, so the water rushed out of the bear, making it smaller. So our hypothesis for both tap and salt water were correct. We carried out the experiment properly

First we measured two gummy bears and figured out their mass. We put one gummy bear in a ziplock bag and sealed it. Then we measured out 150ml of water and placed it in a cup. We left the gummy bears out for 24 hours. The next day we took the gummy bear in the bag out and measured it to see if it had changed. we then drained all the water out of the plastic cup and attempted to get the measurements. We found the mass for the two gummy bears and then figured out the change in volume. The change in volume for our gummy bear was 121mm for the gummy bear in the plastic bag. Then 4492 mm for the gummy bear in the water. The reason the gummy in the water expanded is that the movement of the water molecules into the gummy bears made it expand. Osmosis

Osmosis is a form of diffusion that occurs when there is movement of molecules across a cell membrane in liquid. With the lab one will be able to see the size of three gummy bears change due to being soaked in multiple types of water overnight. Each gummy bear's mass and volume are recorded, and then placed in a beaker of tap, sugar, or salt water. The following day all three gummy bears are taken out to be remeasured after to see the effects on it from osmosis happening. In all of the gummy bears, both the mass and volume increase, resulting in the size of the bears to increase. The bear with the most percentage of change in mass and volume is the one in tap water. The least amount of change in mass and volume occurs in the cup with salt

The gummy bear lab is an example of osmosis. It is set up like this: we received two gummy bear of the same color, red. Then, we measured the gummy bears’ volume, 2340 mm3. One was put in a water about 100 ml and the other was put in a ziploc bag to contain the moisture. This is because the gummy bear in the bag is our constant, we don’t want it to change. Another day passed and we collected data. Not surprisingly, the gummy bear in the water almost tripled in size, 6000 mm3. This is because of diffusion. The gummy bear had a higher concentration than the water, a lower concentration. That is why the water molecules movement went inside the bear. Another example, of osmosis is the eggsperiment. The teacher dumped eggs into a vinegar solution

Polar Bears have dens that tend to be 40 degrees warmer than outside. They has very thick blubber

The water bears are tiny animals with a length of 0.1 to 1.2 millimeters that needs a microscope to see them. They have eight legs with four claws on each. They have short, stout bodies that looks like a cylinder. Their mouths are sharp pointy objects called stylets, which are used to cut into moss leaves or algae, the food that they mainly eat. They also use it to suck juices out of plants as well. Water bears can be gray, blue, yellowish-brown, reddish, or brown in color. The water bears also can form a “tun” which is where they hug their legs, making them take a cylinder shape and shutting down all their metabolism. This allows them to survive many environmental extremes and are one of the toughest animal alive as they are mainly trying to survive.

withstand extreme desiccation. When the water bear is hydrated it makes tons of proteins and

If the bear has low water in the blood the hypothalamus is triggered and this sends messages to the pituitary glands to release ADH, which is a hormone that determines the concentration of the urine, when released this hormone reabsorbs water from the urine. If there is too much water in the body then the production of ADH slows down and can even stop to help reduce the amount of water that is being absorbed. A polar bear can also obtain water by eating different food sources, for example a polar bear needs a high in fat diet, this is because it’s the chemical reaction which allows the body to absorb the water from the food source, that’s why they eat large animals like seals. The blubber of the seal is high in fat which means the body is able to absorb lots of water from it.  Polar bears are able to gain water from eating the snow, however, this is an expensive process for the bear as it takes to much energy to break down the snow enough to get the water from

In the lab that was conducted in class, the question was whether or not the Jicama cores’ mass would change in size when placed into different sucrose solutions overnight. The hypothesis was if you place Jicama cores into different cups containing a lower amount of sucrose concentration and a higher amount of water concentration, then the cell’s mass would change. It was predicted that the cells’ mass would decrease due to less water transferring through the plasma membrane, and this is due to a lower water concentration being inside the solution than inside the core. Tests were taken to see which sucrose solutions caused the mass to decrease and which solutions cause the mass to increase. There was less water concentration when the sucrose

For anatomy and physiology we were learning about human and plant cells. With this lesson we concentrated on the concepts of diffusion and osmosis. Diffusion is the movement of molecules in general from an area of high concentration to low concentration. An example of diffusion is when you spray air freshener. Slowly the smell will spread from one side of a room to another where it is not present, this is diffusion.

3. Some polar bears are drowning because they have to swim longer distances to reach ice floes.