TEKS 5.5B Boiling/Freezing Point

What is happening at water melting point?

• liquid to gas
• solid to liquid
• gas to liquid
• liquid to soild

What is happening at freezing point?

• gas to liquid
• solid to liquid
• liquid to solid
• liquid to gas

A student observes ice forming on the edge of a school building.  At what temperature did the water outside the school building most likely begin to change to ice?

• 100 degrees celsius
• 32 degrees celsius
• 25 degrees celsius
• 0 degrees celsius

A student measures the temperature of water being heated on a hot plate.  The student observes that the temperature of the water is 53 degrees celsius.  How many more degrees Celsius must the temperature rise before it reaches the boiling temperature of water? 

• 37 degrees
• 27 degrees
• 47 degrees
• 100 degrees

Cracks in the seafloor called hydrothermal vents send streams of hot water into the ocean.  The water from a vent is 387 degrees celsius.  How many degrees above the boiling point of water is the temperature? 

• 175 degrees celsius
• 287 degrees celsius
• 387 degrees celsius
• 487 degrees celsius