Matter and Materials Flashcards
Changing Phases
How can something change without changing?
When matter changes state(solid-liquid-gas) it does not change what it
is, it changes how it is
True or false, each state is known as a phase
True
True or false, elements and compounds (matter) cannot move from one
phase to another
False
True or false, elements and compounds only move when physical forces are present.
True
How many physical forces are there?
Two
What are the two physical forces?
Temperature and Pressure
True or false, temperature is a form of energy.
True
True or false, pressure is not a form of energy.
False
Higher temperature = ?
More energy
Lower temperature = ?
Less energy
True or false, changing temperature changes phases of matter.
True
Higher pressure = ?
More energy
lower pressure = ?
Less energy
True or false, changing pressure doesn’t change phases of matter.
False
True or false, as temperature (energy) increases, matter changes from solid to liquid (freezing point) or liquid to gas (boiling point)
True
Define Kindling Point
The temperature at which a particular type of matter
combusts
True or false, the kindling point is the same for all types of matter
False
True or false, every solid has a special temperature at
which it changes from a solid to a liquid.
True
True or false, this is called the “hot spot”
False; this is called the “melting point”
True or false, water has a melting point of just over 0 -
degrees Celsius
True
True or false, other solids have a higher melting point
True
Give an example of solids that have a higher melting point
Steel, rock, or plastic
What is sublimation/deposition?
The transition of a substance directly from the solid to the gas phase without
passing through an intermediate liquid phase.
When does sublimation/deposition occur?
Occurs at a specific temperature and pressure for specific substances
True or false, sublimation/deposition needs a small amount of energy to occur.
False; sublimation/deposition requires extra energy to occur
Give an example of sublimation
Snow will change from a solid to a gas on cold but sunny days (looks like
steam off of a rooftop) and Dry Ice – solidified Carbon Dioxide CO2
