| Physical or Chemical Changes? | Energy | Types of energy | Changing matter and energy |
|---|---|---|---|
|
Physical change
A piece of paper is torn.
|
energy
What is the ability to do work or produce heat called?
|
heat energy
What kind of energy involves moving molecules?
|
melting
What is it called when ice changes to liquid water?
|
|
Chemical change
A piece of paper burns
|
potential
Stored energy is __________ energy.
|
chemical energy
What kind of energy is store in molecules?
|
When ice changes to liquid water.
What is melting?
|
|
A change of odor and color. The molecules have changed.
A banana rots. What two things show you that a chance has happened?
|
kinetic
Energy of motion is ____________________ energy.
|
mechanical
What kind of energy is the moving parts in a machine?
|
A. condensation
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Which of the following could occur as a result of decreasing the heat energy of a gas? A. condensation B. evaporation C. radiation D. vaporization |
|
This is a physical change because a the water vapor can be changed back into water. The molecules did not change.
A teacher puts a beaker of water onto a hot plate and heats it until bubbles appear. Classify this as a physical or chemical change and explain your reasoning using specific details.
|
The book on the middle shelf has less potential energy because it has less space to fall.
Which book has less potential energy - a book on the top shelf of a bookcase or the middle shelf? Explain your answer.
|
electrical energy
What causes a light bulb to light and occurs when electrons move?
|
light, heat
When black paper becomes warm when the sun shines on it, it is an example of _______________ energy changing into _________________ energy.
|
|
This is a physical change because a solution was produced, and it can be undone using evaporation. The molecules did not change.
A teacher puts a sugar cube into a container of warm water. Eventually the sugar cube is no longer visible. Classify this as a physical or chemical change and explain your reasoning using specific details.
|
The book on the top shelf has more potential energy because it has farther to fall.
Which book has more potential energy - a book on the top shelf of a bookcase or the middle shelf? Explain your answer.
|
nuclear fission
What is it called when an atom splits into two smaller atoms?
|
This is a chemical change because a gas was created and the molecules changed.
A teacher pours vinegar into a small container of baking soda. The combined substances begin to fizz and bubble as gas is released. Classify this as a physical or chemical change and explain your reasoning using specific details.
|
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