Questions: Which statement best compares and contrasts two physical properties of matter? Density and solubility are similar because they both involve water, but they are different because density involves dissolving a material and solubility involves floating or sinking a material. Density and solubility are similar because they both involve a material's mass and volume, but they are different because density involves floating materials and solubility involves sinking materials. Boiling points and melting points are similar because they both involve changing the heat of a material, but they are different because boiling point involves adding heat to a material and melting point involves removing heat from a material. Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.

Solution Steps

To answer the question, we need to understand the physical properties mentioned: density, solubility, boiling point, and melting point.

• Density is the mass per unit volume of a substance.
• Solubility is the ability of a substance to dissolve in a solvent, such as water.
• Boiling Point is the temperature at which a substance changes from a liquid to a gas.
• Melting Point is the temperature at which a substance changes from a solid to a liquid.

We need to evaluate each statement to determine which one accurately compares and contrasts the physical properties:

1. The first statement incorrectly describes density and solubility. Density does not involve dissolving, and solubility does not involve floating or sinking.
2. The second statement also incorrectly describes density and solubility. Density does not involve floating, and solubility does not involve sinking.
3. The third statement incorrectly describes boiling and melting points. Both involve adding heat, but the processes are different.
4. The fourth statement correctly describes boiling and melting points. Both involve a change in state, but boiling is from liquid to gas, and melting is from solid to liquid.

Based on the analysis, the fourth statement accurately compares and contrasts the physical properties of boiling and melting points.

Final Answer