Read p. 353 of Foundations of physical science by Tom Hsu Find and discuss the definition “change in physical property” Write this definition in your own words. List as many physical properties as you can. Use your book, check the index read chapter and section headings. As a team, define what a physical property is.

Physical Property A physical property is one that is displayed without any change in composition. (Intensive or Extensive) A characteristic that describes a property that is “owned” by a piece of matter and can be detected by our senses without changing how the matter is arranged For example, you can observe the color of hair or taste the rainbow if you eat skittles without changing the hair or the candy.

Intensive properties: A physical property that will be the same regardless of the amount of matter Brittleness: Tendency to shatter State (solid, liquid, gas) Condensation / Vaporization (boiling) point Freezing / Melting point Viscosity: resistance to flow Miscibility: whether matter will combine to form a solution Albedo: how much energy is reflected back compared to how much energy is absorbed. Solubility: how much one substance can be dissolved by another substance. Thermal conductivity: how heat flows through matter specific heat: how much energy it takes to change the amount of heat something can hold magnetism density: m/v color: The pigment or shade  conductivity: How electricity flows through the substance malleability: how much a substance can be flattened without breaking. luster: how shiny the substance looks  Hardness: Mohs scale resistance to scratching Elasticity: How much something can stretch and return to it’s original shape before it breaks Tensile Strength: how much the matter can be pulled before breaking Buoyancy: related to density of a fluid-how much push back when pushed on. Texture: How rough or smooth something feels

Extensive Properties A physical property that will change if the amount of matter changes. Mass: how much matter in the sample Weight: how gravity affects the mass Volume: How much space the sample takes up Energy: how much energy is contained within the matter Size and Shape Length, width, height: How long, high or wide the sample is  Electrical charge: how much charge is stored within the matter.

Physical Change: For example: Change in which the matter's physical properties are altered, but composition (what it is made up of) remains unchanged. The atomic structure of the molecules does not change. For example: If water is cooled or heated the density changes but it’s still water When energy is changed it can change the state of matter (liquid solid or gas) but it still is the same kind of matter. When hair is cut or dyed the length or color changes but it is still hair When water, lemon and sugar are mixed together it makes lemonade but the water is still H2O and the sugar is still C12H22O11 and the lemon is still lemon.

Chemical Property: Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition. Examples: Reactivity: How chemically stable matter is - Alkali metals react with water. Flammability: How matter reacts to heat - Paper's ability to burn. Acidity / Alkalinity: How acidic or basic something is Corrosion: degradation of a material due to a reaction with its environment – batteries can corrode due to the reaction between two dissimilar metals. Oxidation: How matter reacts to oxygen is a specific type of corrosion - Iron reacts with oxygen to form rust, apple turns brown, penny turns green Catalysis: ability to increase reaction rate - Heat of combustion: How much heat is released during burning Toxicity: how poisonous something is to life.

Chemical Change: Change in which one or more kinds of matter are transformed to new kinds of matter with altered compositions (Chemical Reaction). Research : Is pH a physical or chemical property? What about smell? Question If physical is pH or smell intensive or extensive? Take a stand, state why, cite sources

Milk turns sour. This is a _______________ Chemical Change Physical Change Chemical Property Physical Property None of the above 0 of 20 :30

HCl being a strong acid is a __________, Wood sawed in two is ___________ Chemical Change, Physical Change Physical Change, Chemical Change Chemical Property, Physical Change Physical Property, Chemical Change None of the above 30

CuSO4 is dissolved in water Chemical Change Physical Change Chemical Property Physical Property None of the above   30

Aluminum Phosphate has a density of 2.566 g/cm3 30 Chemical Change Physical Change Chemical Property Physical Property None of the above

Which of the following are examples of matter? 30 Which of the following are examples of matter? A Dog Carbon Dioxide Ice Cubes copper (II) nitrate All of the above

The mass of lead is a (an) ______ _______property Intrinsic physical Extrinsic physical Intrinsic Chemical Extrinsic chemical 30

Is sunlight matter? True False 30

Bread rising is a physical property 30 Bread rising is a physical property True False

Dicing potatoes is a physical change True False 30

The formation of gas bubbles is a sign of what type of change? Physical Chemical Both None 30