Particles
Gas particles are like bouncy balls pinging around the room. Why is this?
They do not have bonds holding them together.
Energy always moves from___________ energy (hot) to_________ energy (cold)
Higher (hot) to lower (cooler)
Energy in motion
kinetic energy
The three states of matter are:
Solid, liquid, gas
Balloons can be twisted into shapes because:
True or false, Liquid particles can move past and around one another.
True, liquid particles have medium bonds that allow them to move past and around each other.
What is temperature?
the average kinetic energy of the particles of an object or substance.
What is conduction?
transfer of energy when two particles collide
When a solid turns into a liquid, this process is called? When a Liquid turns into a gas this process is called?
Melting and Vaporization
What is the law of conservation of energy?
No energy is created or destroyed during energy transfers
What happens to particles when a liquid becomes a gas?
the particles break away from one another
______________ equilibrium happens when__________flows from a higher temperature object to lower temperature object
Thermal, heat
As kinetic energy increases, the temperature ____________
The temperature increases
What's absolute zero?
The theoretical temperature where molecules have no movement at all.
What is a vacuum system?
space containing no particles of air or anything else
What happens to particles when thermal energy is added?
the particles speed up
Materials that_______ allow heat energy to pass through them well are called________________
don't, insulators
What is the Kinetic Molecular Theory?
all matter is made of tiny particles and all particles are in constant motion.
When a solid changes directly to a gas this is called
Sublimation
What is the transfer of heat through empty space by invisible electromagnetic rays?
Radiation
A solid is described as having a fixed shape. The particles at an atomic level are:
A) Sliding or flowing past each other.
B)Free fast moving in straight lines colliding with other particles
C) Organized and vibrate in place
C) Organized and vibrate in place
As energy is increasingly transferred to ice up to 120 °C, the ice undergoes (i.e. what order of phase change):
first it MELTS, next it BOILS, then it VAPORIZES.
As the temperature of a substance lowers, the Kinetic Energy or movement of molecules:
the molecules slow down
When a GAS changes directly to a SOLID this is called
Deposition
True or False?
Your friend approaches you with an ice cube in her hand. She says that the ice is melting because the cold is transferring to her hand causing it to melt.
False, energy always transfers from hot to cold. The heat from your hand causes the ice to melt.