Question

Lab Exercise: Liquids and Gases Answer Key

LAB EXERCISE: LIQUIDS AND GASES Part 1: Buoyancy Fill a large glass half full of water. 1. Carefully place a raw egg in the glass of water. 2. Does the egg sink or float? 3. 4. Based on the results, which do you think is the most dense? The egg or the water? 5. Gradually add salt to the water, stirring after each addition to dissolve it. Careful! Don't break the egg! Keep adding salt until the egg floats. 6. Now, which is more dense, the egg or the salt water? 7. If a cargo ship sailed into port from the ocean and entered fresh water, would the ship float higher or lower in the fresh water? Explain how the density of a fluid affects the amount of buoyant force that the fluid can apply to an object. For example, the more dense the fluid, the applied to an object. 8. (more/less) buoyant force can be

Answer 1

3. Egg will sink as egg is denser than water.

4. egg is denser than water as egg sinks in water.

6. after adding enough slat, egg floats that means egg is lighter than water now. So salt water is denser.

7. ocean is salt water and so denser than fresh water. Cargo ship will float lower in fresh water as fresh water is less dense.

8. Density of fluid is directly proportional to buoyant force. For example, If fluid is more dense, the more buoyant force is applies to an object.