Determining If An Egg Will Float In Salt Water
Objective/Question/Problem The objective of this project is to see if an egg will float in salt water. The question is how much salt is needed to be added to the water to make the egg float. The problem is that no one knows how much salt is needed to make an egg float.
Hypothesis
It will take at least three teaspoons of salt to be added to the water for the egg to float. The reason why I think three teaspoons of salt will need to be added to water for the egg to float is because the egg a density that is lower than the density of the salt water.
Background information Density and buoyancy are the main scientific reasons for the egg floating in the salt water. Density is the measure of how tightly packed matter is (Buller, 96). For this
reason, if the object has a density that is higher than the density of the fluid it is in then it will sink. If the object has a density that is lower than the density of the fluid it is in, the object will float. Buoyancy is the ability to float (Buller, 96). The egg will float because it is lighter than the salt water.
Variables
The independent variable is the amount of salt needed to make the egg float. The dependent variable is the flotation of the egg. The controlled variables are the same type glasses, the same amount of water, and the same size eggs.
Materials
1. 6 large raw eggs
2. 6-9oz clear plastic cups
3. Distilled water
4. Non iodizing table salt
5. Teaspoon measuring spoon
6. Black permanent marker
7. Measuring cup
8. Stirring spoon
Procedure/Method
Step 1-Label each glass with permanent marker.
Step 2-Fill each glass with 1/2 cup of distilled water using measuring cup.
Step 3-Use measuring teaspoon and put appropriate amount of salt in each cup as labeled.
Step 4-Mix the water and salt with stirring spoon until salt is no longer seen on bottom of cup.
Step 5-Gently put an egg in each cup.
Step 6-Record your findings of the experiment.
Data and Observation The cup with no salt, the egg sank to the bottom of the cup. The cup labeled one teaspoon, the egg sank to the bottom of the cup. The cup labeled two teaspoon, the egg floated slightly exposing very little to none of egg out of the water. The cup labeled three teaspoon, the egg floated the same as the egg in cup labeled two teaspoon. The cup labeled four teaspoon, the egg floated more which exposed more of the egg out of the water. The cup labeled five teaspoon, the egg floated even more exposing more of the egg out of the water.
Conclusion
The results were that adding salt to water will make an egg float. Eggs could float because the density of the water increased which made the egg float. The more salt added to the water the more the egg will float.
Hypothesis
It will take at least three teaspoons of salt to be added to the water for the egg to float. The reason why I think three teaspoons of salt will need to be added to water for the egg to float is because the egg a density that is lower than the density of the salt water.
Background information Density and buoyancy are the main scientific reasons for the egg floating in the salt water. Density is the measure of how tightly packed matter is (Buller, 96). For this
reason, if the object has a density that is higher than the density of the fluid it is in then it will sink. If the object has a density that is lower than the density of the fluid it is in, the object will float. Buoyancy is the ability to float (Buller, 96). The egg will float because it is lighter than the salt water.
Variables
The independent variable is the amount of salt needed to make the egg float. The dependent variable is the flotation of the egg. The controlled variables are the same type glasses, the same amount of water, and the same size eggs.
Materials
1. 6 large raw eggs
2. 6-9oz clear plastic cups
3. Distilled water
4. Non iodizing table salt
5. Teaspoon measuring spoon
6. Black permanent marker
7. Measuring cup
8. Stirring spoon
Procedure/Method
Step 1-Label each glass with permanent marker.
Step 2-Fill each glass with 1/2 cup of distilled water using measuring cup.
Step 3-Use measuring teaspoon and put appropriate amount of salt in each cup as labeled.
Step 4-Mix the water and salt with stirring spoon until salt is no longer seen on bottom of cup.
Step 5-Gently put an egg in each cup.
Step 6-Record your findings of the experiment.
Data and Observation The cup with no salt, the egg sank to the bottom of the cup. The cup labeled one teaspoon, the egg sank to the bottom of the cup. The cup labeled two teaspoon, the egg floated slightly exposing very little to none of egg out of the water. The cup labeled three teaspoon, the egg floated the same as the egg in cup labeled two teaspoon. The cup labeled four teaspoon, the egg floated more which exposed more of the egg out of the water. The cup labeled five teaspoon, the egg floated even more exposing more of the egg out of the water.
Conclusion
The results were that adding salt to water will make an egg float. Eggs could float because the density of the water increased which made the egg float. The more salt added to the water the more the egg will float.