Molecular Changes
What is the process called when molecules gain energy and move faster?
heating
What is heat?
Energy transfer
What is the total energy of all the particles in a substance?
thermal energy
anything that has mass and occupies space
matter
What term describes the process of a gas turning into a liquid?
condensation
How do molecular changes affect the state of matter?
How does adding heat affect molecular movement?
Increases
the transfer of heat through direct contact between materials.
conduction
What are the four states of matter we discussed?
solid, liquid, gas, and plasma
transition of a substance directly from the solid to the gas state, without passing through the liquid state
sublimation
Describe how molecular energy changes during a phase change (1-2 word answer would work)
Hint: what happens to the energy
absorbed or released
this states that energy is never created nor destroyed
Law of conservation of energy
transfer of heat through the movement of fluids
convection
Describe the particle arrangement in gases
they are far apart and move freely
average kinetic energy of all the particles in a material
temperature
These are good conductors because of the way they bond together, leaving a "sea" of electrons
metals
When two objects are the same temperature ____ heat flows between them
no
transfer of heat through electromagnetic waves, such as sunlight.
radiation
Describe the particle arrangement in solids
closely packed
this phase of matter is present in stars, lightning, and auroras
plasma
Temperature is measured scientifically in either of these units (you just need to put one of the two correct answers)
Celsius OR Kelvin
How does matter change phases/states?
gaining or losing thermal energy
name a state of matter that isn't a fluid
solid
has a definite volume, but an indefinite shape. is not easily compressible, but its molecules slide past each other to take the shape of its container
liquid