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WorksheetsPh8 Orientation - Changes of state
Total questions: 10
Worksheet time: 5mins
Fill in the blank: The melting point of ice is _____
0°C
100°C
-10°C
50°C
This statements is about the melting point of ice. "The temperature of ice taken out of the freezer is 0°C".
I think this is right
I think this is wrong
This statements is about the melting point of ice. "When it melts the temperature of ice is higher than 0°C".
I think this is right
I think this is wrong
This statements is about the melting point of ice. "The temperature of water in the beaker is 0°C until after all the ice has melted."
I think this is right
I think this is wrong
Which statement do you think best describes what happens as a substance changes state?
A. The type of molecule of the substance changes.
B. The mass of the molecules of the substance changes.
C. The shape of the molecules of the substance changes.
D. The connection between the molecules of the substance changes.
Which statement best explains what happens when water boils?
The molecules are destroyed.
The mass of the molecules decreases.
The molecules become separated from each other.
The molecules break down into hydrogen and oxygen atoms.
Which graph shows how temperature changes as the water is heated?
A. [Graph A]
B. [Graph B]
Kieran uses a hot grill to make cheese on toast. Under the grill the cheese melts and becomes a liquid. Which statement best explains why the cheese becomes a liquid?
Some of the cheese molecules get smaller.
Some of the cheese molecules are destroyed.
The cheese molecules change into water molecules.
The cheese molecules are more loosely connected to each other.
Salol is a chemical that melts at 41.5oC (this is its melting and freezing point)
Some salol was warmed to 60oC in a boiling tube and allowed to cool.
As it cools its temperature is measured using a thermometer.
As it cools, when does salol reach its freezing point?
As soon it starts to change into its solid state.
When about half of it is in a solid state.
Only when all of it is in a solid state.
At 0 degrees
BONUS QUESTION - After it reaches its freezing point, when does the temperature of salol start to fall again?
As soon it starts to change into its solid state.
When about half of it is in a solid state.
Only when all of it is in a solid state.
