Question

how did altitude affect the freezing, melting, and boiling points of water? 3 points
increase decrease stays the same
melting point
boiling point
freezing

Explanation:

• Melting Point (Freezing Point): The melting and freezing points of water depend on the presence of impurities and pressure. Atmospheric pressure changes with altitude, but for water, the effect of pressure on melting/freezing point is minimal (unlike boiling point). So, the melting (and freezing) point of water stays the same with altitude changes.
• Boiling Point: Boiling occurs when vapor pressure equals atmospheric pressure. As altitude increases, atmospheric pressure decreases. So, water needs less heat to reach a vapor pressure equal to the lower atmospheric pressure, meaning the boiling point decreases with increasing altitude.

Answer:

• Melting Point: Stays the same (select the "Stays the same" option for Melting Point)
• Boiling Point: decrease (select the "decrease" option for Boiling Point)
• Freezing: Stays the same (select the "Stays the same" option for Freezing)