States of Matter
These are 3 states of matter.
solid, liquid, gas.
This is the definition for the word 'phase change'.
a substance changes from one state of matter to another.
This term means that energy is released or exits a substance.
exothermic.
Provide one example of a qualitative observation.
The desk is red.
You forgot to turn off the teakettle, and now the water is gone.
Vaporization
What are the behaviors of particles for a solid, liquid, and gas?
solid particles move slow, are orderly, and compact.
liquid particles have an average speed, are random, and spread a little apart.
gas particles move very fast, are random, and spread very far apart.
This phase change goes from a liquid to a gas.
vaporization.
Bonus: What are the 2 types of vaporization and how do they differ?
This term means energy is absorbed or comes into a substance.
endothermic.
Provide one example of an inference.
The desk has recently been painted red.
The wet sponge you left on the counter last night is dry this morning.
vaporization
Describe what plasma is and at what temperature it is found.
What is when particles are at extremely high temperatures, found in space, particles are more spaced out and random than a gas.
Bonus: Give an example of plasma.
This phase change occurs when a solid turns into a gas.
sublimation.
Bonus: Give an example of sublimation.
When condensation occurs, how does energy flow?
Energy is released.
Bonus: Is this endothermic or exothermic?
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed, it can only be changed from one form to another.
When you put the lid on the simmering soup, the inside of the lid gets all wet.
Condensation
Rank the densities of the states of matter from smallest to largest.
What is gas, liquid, solid.
This is the temperature where something melts.
320 F -or- 00 C
Bonus: How does salt affect the melting point of water?
Identify all of the phase changes that are endothermic.
Melting, vaporization, and sublimation.
What does the Particle (or Kinetic) theory state?
Molecules are always moving in a random motion.
You get in your car early one December morning and notice a frost has formed on your rear view mirror. It looks almost like a silver mirror.
Deposition
Describe the difference between density and buoyancy.
Density describes how compact particles are and buoyancy is the force on an object when in a substance that allows the object to float. (buoyancy = weight of object)
State each phase change and provide an example of each.
What are freezing (frozen pond), melting (candle when lit), vaporization (boiling: water on the stove) (evaporation: puddle in the sun), condensation (steam on mirror), sublimation (solid air freshener), and deposition (frost on car window)
Identify all of the phase changes that are exothermic.
Freezing, condensation, and deposition.
Bonus: What is deposition?
Why is sodium chloride placed on icy patches on highways and on steps in the winter?
The freezing point is lowered and the ice melts.
Your solid air freshener releases a pleasant scent throughout the room.
Sublimation