Phase Changes
This phase change describes a solid to a liquid.
What is melting?
Describe the particle arrangement of the following states of matter: solid, liquid, gas.
What is solids=tightly packed. Liquids=loosely packed. Gas=Free flowing
Provide an example of a heterogeneous mixture.
Answers can include any mixtures where the pieces are visibly seen. (What is pizza? What is a salad? What is sand? What is a taco?)
Give an example of an element.
What is any element found on the periodic table?
The symbol for Oxygen is O. This shows it is an:
What is an element?
This phase change describes a liquid to a gas.
What is evaporating?
Describe how thermal energy affects the particles of the states of matter.
What is when thermal energy is added, particles speed up. When thermal energy is removed, they slow down.
Provide an example of a homogeneous mixture.
Answer can include mixtures where components are not visibly seen (What is salt water? What is lemonade? What is juice? What are solutions?)
Give an example of a compound with its formula.
What is (examples: H2O, CaCO3, NaCl, etc.)?
The formula for sugar water is C6H12O6 + H2O. This formula shows sugar water is a:
What is a mixture?
This phase change describes a liquid to a solid.
Thermal energy is removed from a liquid. Describe the properties of the new state of matter.
What is a solid with a definite shape and volume?
This describes how mixtures are combined and separated.
What is physically?
Describe why elements AND compounds are classified as pure substances and not mixtures.
The formula for salt is NaCl. This shows that it is a
What is a compound?
This phase change describes gas to liquid.
What is condensation?
Thermal energy is added to a liquid. Describe the new state of matter.
What is gas with an indefinite shape and indefinite volume?
Why are mixtures not classified as pure substances?
What is they are not chemically combined?
Describe why elements and compounds are not considered different types of matter.
What is elements and compounds can go through phase changes, but keep their composition?
Lead (Pb) is composed only of Lead atoms. This shows that Lead is a(n):
What is an element?
This phase change describes solid to gas.
What is sublimation?
Describe the difference between thermal energy and temperature.
What is thermal energy is the heat source and temperature is the amount of heat energy?
What is the difference between a colloid and a suspension?
What is colloids particles cannot be seen (milk). Suspensions pieces eventually settle and are seen (salad dressing)?
Describe a process that can be used to separate a compound.
What is (extraction, distillation, electrical energy, etc.) *Chemical changes
The atmosphere is composed of: Nitrogen (N2), Oxygen (O2), Carbon Dioxide (CO2), Methane (CH4), and Ozone (O3). This is a mixture composed of:
What are Molecules?