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States of Matter
Properties
Changing States
Changing States #2
Physical & Chemical
100
What are the 4 states of matter that we discussed in class?
Solid, liquid, gas, plasma
100
What term means " a characteristic that helps identify a substance"?
property
100
Melting is changing states from ______________ to ___________________?
Solid to liquid
100
A gas does not have a definite shape or _______________?
volume
100
What do you call the change in one or more of the physical properties of a substance?
physical change
200
What state of matter has a definite volume but no definite shape?
liquid
200
What are 3 examples of physical properties?
color, size, texture,odor, shape, melting boint, boiling point, density
200
Vaporization can happen in two ways. What are they?
Evaporation, boiling
200
The molecules in a solid move so slowly they seem to __________________?
vibrate
200
What do you call a change when one or more substances are changed into a new substance with new properties?
Chemical Change
300
What state of matter spreads out to fill the container it is in?
gas
300
What is density?
How much mass is in a given space.
300
What is the change of state from solid to gas?
sublimation
300
In what state, do the molecules seem to slide past each other?
liquid
300
Name two clues that a chemical change is taking place.
color change, fizzing, foaming. Producing heat, light, sound, odor.
400
What is an example of a plasma (not man-made)?
Lightning, sun's corona, Northern Lights.
400
Chemical properties of substances cannot be see until this happens?
Until the substance reacts with others to form a new substance
400
What change of state is the opposite of vaporization?
Condensation
400
In frost formation, what states are involved?
A gas turns into a solid. It skips the liquid state.
400
When the bumper of a truck rusts, what type of change is taking place? How do you know?
Chemical. You can never change the rust back into steel.
500
Why does a substance change states?
A substance changes states because it either gains too much or loses too much energy to stay in the state it is currently in.
500
Flammability is an example of what type of property?
Chemical
500
What happens to the attraction between the molecules when water changes from a solid (ice) to a liquid?
The attraction between the molecules weakens or becomes less
500
What is our most common example of sublimation?
dry ice
500
If a plate breaks, what type of change has taken place? How do you know?
Physical. Because the pieces are made of the same substance and have the same properties as the unbroken plate.