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Physics Chapter 23 Powerpoint QnA (1
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Physics Chapter 23 Powerpoint QnA (1
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Physics Chapter 23 Powerpoint QnAHow many common phases of matter are there? - CORRECT ANSWER-3
What are the common phases of matter? - CORRECT ANSWER-solid, liquid, and
gas
What 2 things does the phase of matter depend on? - CORRECT
ANSWER-temperature and pressure
True or False A change in phase will not have any effect on energy. - CORRECT
ANSWER-False
Evaporation involves a change from ____ to ____ - CORRECT ANSWER-Liquid to
gas
Where does evaporation of a liquid normally take place? - CORRECT ANSWER-The
surface
Explain "billiard ball physics". - CORRECT ANSWER-When heated molecules bump
into each other faster and faster with enough energy to make molecules fly away
How is the energy level affected in 2 molecules when they collide. - CORRECT
ANSWER-one gains, the other loses energy
Is evaporation a cooling or heating process? - CORRECT ANSWER-cooling
How is the human body able to maintain a low temperature? - CORRECT
ANSWER-perspiration, evaporation from sweating
How do dogs stay cool? - CORRECT ANSWER-they pant, allowing evaporation from
their mouth, they also have sweat glands in their paws
Where does evaporation take place in a dog? - CORRECT ANSWER-the mouth
This process is the opposite of evaporation. - CORRECT ANSWER-condensation
With evaporation, how does the phase of matter change - CORRECT
ANSWER-liquid to gas
Why do water droplets form on the outside of a can that is taken out of the
refirgerator? - CORRECT ANSWER-water vapor has collided with the slower moving
molecules on the surface of the can
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