Solid, Liquid, Gas, Plasma
Indefinite volume and indefinite shape; occupies more space than a solid or liquid
What are the properties of a gas?
What are all elements made up of?
What are atoms
Compounds-substance made up of 2 or more elements chemically combined
Element-substance made up of only 1 type of atom
What are the two types of pure substances and how they differ?
Color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density.
What are examples of physical properties?
What are two phase changes that happen between liquids and gases?
Liquids: vaporization-phase of an element or compound from a solid phase or liquid phase to a gas
evaporation-type of vaporization wherein the transition from a liquid phase to a gas phase takes place below the boiling temperature at a given pressure, and it occurs on the surface.
Gases: Condensation
Homogeneous-same composition throughout; ex: solution
Heterogeneous-visible parts can be seen throughout substance
What are the two types of mixtures and how they differ
Molecules
What we call two or more ATOMS chemically combined
Chemical change because enzymes break food down and convert for the body to be able to use
What is the type of change digesting food is and why?
Condensation: phase change from gas to liquid
Freezing: phase change from liquid to solid
What are the phase changes that happen b/c heat is removed?
What are the properties of a solid
Chemical bonds
What holds atoms together in a molecule?
Chemical properties
What are properties that you would not know from just looking at a substance
Molecules are tightly packed together that vibrate; definite shape and definite volume
What are the properties of a solid?
How does temperature affect gas particles?
Compound
What we call two or more elements chemically combined in a set ratio?
What is the type of physical change that ALL phase changes are?
What are two phase changes that happen between solids and liquids?
Solids: melting and sublimation
Liquids: vaporization-phase of an element or compound from a solid phase or liquid phase to a gas
evaporation-type of vaporization wherein the transition from a liquid phase to a gas phase takes place below the boiling temperature at a given pressure, and it occurs on the surface.
The substance may dissolve, change shape or form, change of phase
What are the signs of a physical change?
What are physical properties
Properties that are measured with a lab tool or observed with 5 senses
Heat of combustion, reactivity with water, PH, and electromotive force.
What are examples of chemical properties?