WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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A student places a raw egg in a beaker of tap water (fresh water); the egg sinks to the bottom. After adding 4 tablespoons of salt and stirring, the egg floats to the water surface. Why does the egg float in salt water?

Dissolved salt increases liquid density, making salt water denser than the egg and creating greater buoyant force. Salt water is less dense than fresh water. Salt dissolves the eggshell, making it weightless. Salt turns water into solid ice.

Correct Answer:

Dissolved salt increases liquid density, making salt water denser than the egg and creating greater buoyant force.

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