Question

When two blocks of ice are pressed against each other then they stick together (coalesce) because

• A. cooling is produced.
• B. heat is produced.
• C. increase in pressure increase melting point.
• D. increase in pressure, decrease in melting point.

Answer 1

Answer: (D)

increase in pressure, decrease in melting point.

When they are pressed against each other, pressure increases so the melting point decreases. A layer of water forms at the contact area. This makes both the blocks of ice to stick together when the pressure is released.