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Questions and Answers
What is an open system?
Which variable is changed in an experiment?
What is evaporation?
What is thermal energy?
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What does a model represent?
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What is the function of constraints?
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What term describes the transfer of thermal energy through particle collisions?
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Which temperature scale is used by scientists and reflects the complete absence of thermal energy at 0?
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As water is heated on a stove, what happens to the water molecules?
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What process occurs when water particles vibrate so quickly that they change from liquid to gas?
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What term describes the smallest unit of a substance that retains its properties?
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What property is used to define matter?
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Study Notes
Open Systems
- An open system exchanges both matter and energy with its surroundings.
Variables in Experiments
- The independent variable is the one that is changed or manipulated in an experiment to observe effects.
Evaporation
- Evaporation is the process where liquid water transforms into vapor, occurring at any temperature but increasing with heat.
Thermal Energy
- Thermal energy refers to the total kinetic energy of particles in a substance, linked to temperature and heat transfer.
Models
- A model represents complex systems or phenomena, simplifying to enhance understanding and prediction of behaviors.
Function of Constraints
- Constraints are limitations or restrictions that define the boundaries within which a system must operate, impacting design and functionality.
Thermal Energy Transfer
- Conduction describes the transfer of thermal energy through direct particle collisions, occurring in solids as heat passes through.
Temperature Scale
- The Kelvin scale, used by scientists, indicates absolute temperature with 0 K representing the complete absence of thermal energy.
Behavior of Water Molecules
- As water is heated, the kinetic energy of its molecules increases, causing them to move more rapidly and farther apart.
Phase Change Process
- Boiling occurs when water particles gain enough energy to change from liquid to gas state, indicating a rapid increase in temperature.
Smallest Unit of Substance
- An atom is the smallest unit of a substance that retains its chemical properties and identity.
Defining Matter
- Mass is the property used to define matter, indicating the amount of substance contained in an object.
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Description
Test your knowledge on system components like open and closed systems, as well as variables like independent and dependent variables. Explore the concepts of models and control variables in this quiz.
