I predict that adding salt to water will increase the water's density, making it easier for a lime and a potato to float. With enough salt, both objects will eventually float because the water will become denser than they are. However, the amount of salt needed to achieve this will likely differ for each object due to their varying densities. Essentially, this experiment will demonstrate how the density of a liquid directly influences the buoyancy of objects within it.

Question: Why is it easier for you to float on saltwater than freshwater?  Answer: When the salt is added to the water, the salt affects the density of water and makes the water denser than without it.  Author: Toppr.com

Question: What makes the lime sink in water?  Answer: While both lemons and limes have densities close to water, limes are just a bit heavier, causing them to sink. Peeling a lemon slightly increases its weight, making it more likely to sink as well.  Arthur:- uhi

Question: Why does a potato sink in water? Answer: The ability of a potato to float in water depends on it’s density Compared to the water’s density. For example when we add salt in the water it’s density increases, hence the potato starts to float in the salt water. Arthur:- Teknisk Museum

Controlled Variable

• Lime and potato
• Quantity of water (3 cups)
• The container 

Manipulated Variable

Quantities of salt

Responding Variable

The level of float of lime and potato

1. Pour water in the container .
2. Add the first quantity of salt 
3. Put the potato in the  salt water 
4. Rinse the potato.
5. Add the different quantities of salt
6. Do the step 3 and 4
7.  Check with millimeter scale three times
8. Do the same thing again but with a lime. 

I added 1 tsp of salt and then added lime in it for a few seconds it floated but after it immediately sank. It is because the lime was denser than my solution of salt and water. I added ½ tbsp of salt into the water then added the lime into it. First it floated low then it slowly started to go up. It is because the density of the lime and the solution was same.I added 5 tbsp of salt into the water and then added the lime.When I added the lime it didn’t sink, it is because the solution is more dense than the lime.

When I added 1 tsp of salt in the water the potato started sinking immediately . It is because the potato was much more dense than the solution.When I added ½ tbsp of salt the potato floated low then started sinking. This is because the potato is still more dense than the solution.When  added 5 tbsp of salt into the water the potato started floating for a few seconds but after that it started sinking.It was because potato is a little dense than our solution.

In my experiment when I was adding more salt into it the solution was getting denser that made the lime float but it was not happening with the potato it was sinking because the solution was not dense enough to make the potato float.

My hypothesis was both correct and incorrect because according to my hypothesis the lime and potato they both should float. Yes, lime floated in different heights but that was not the same case with the potato it didn’t even floated

When the water is added with a floating substance like limes and potatoes, the level increase, due to the salt dissolving and making the water denser. After some time, when the water becomes denser than them, they float because of the rise of buoyancy. This experiment applications on the principles of oceanography and in food preservation as it comes down to the matter of density changes affecting buoyancy-highly important in life at sea. Oceanography is a very difficult experiment that is used all over the world. Different amounts of salt in the water affects the plants and animals living in the ocean. It will most certainly also do with the preservation of food through called Brining, which makes a solution denser to create an unsuitable environment for bacterial growth.

First I thought that to use egg instead of lime then I did some research and found out that if the egg is spoiled from inside then it will float and that would affect my experiment because I need things that sink or else my experiment will not work.

I would like to give special thanks to my teachers Ms.Olfert, Ms.Duncan, Ms.Nanji. They all helped me whenever I was stuck throught my project. Your guidance and encouragement have been so special helping me understand and complete this project JUST FLOAT. This project has not only taught me enhance my peoblem-solving skills.I am greatful for the opportunity to work on this project and I am proud of the results I have achieved. Thank you everyone for your support and believe in my abilities.