Phase Change Gizmo

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Multiple Choice

The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature & volume of the water in the pot?

• The temperature will rise, & the water volume will decrease

• The temperature will rise, & the water volume will remain constant

• The temperature will remain constant, & the water volume will decrease

• The temperature will remain constant, & the water volume will remain constant

Multiple Choice

Which of the following statements is most accurate?

• Whien liquid ater is heated, the molecules move faster

• When liquid water is heated, the molecules collide more often

• When liuid water is heated, collisions between molecules are more violent

• all of these

Multiple Choice

In a pressure cooker, a lid is screweed tightly onto a pot so that the air pressure in the pot is increased. What effect, if any, will this have on the boiling point of water in the pot?

• The boiling point will be raised

• the boiling point will be lowered

• The boiling point will be unaffected

• none of these

Multiple Choice

Which of the following descriptions explains the process of water freezing?

• Water molecules speed up until they escape into a different phase

• Water molecules slow down until they begin to bond together

• Water molecules are squeezed together by high pressure until they begin to stick to one another

• As water molecules cool, their shape changes from rounded to irregular, making them more likely to link to one another

Multiple Choice

Which graph shows water boiling in Denver Colorado?

• A

• B

• C

• D