8.1 physical and chemical properties

8.1 simple chemical reactions

You can see that snow and sand have a different color.

You can feel that snow is softer than sand.

Both color and hardness are physical properties of matter.

What differences between snow and sand can you detect with your senses?

• ability to conduct heat

• ability to conduct electricity

• malleable - able to be shaped

• ductile - can be rolled and stretched into long thin shapes

What are some physical properties of this copper wire?

Both of these observations are examples of physical properties:

• solubility - the ability to dissolve in other substances

• density - how closely packed the particles of matter are to each other

This is lemonade. It contains dissolved sugar. The ice cubes float at the top because they are less dense than the lemonade.

All of these are physical properties of matter!

• boiling point - the temperature at which a substance boils

• melting point - the temperature at which a substance melts

• freezing point - the temperature at which a substance freezes

Categorize

Options (6)

orange

yellow

sweet

sour

roundish

slightly rough

We are comparing lemons and oranges. Categorize each of the characteristics below as belonging to just oranges, just lemons, or both.

just oranges

just lemons

both

Match

What type of physical properties are the orange and lemon characteristics?

• red and orange

• sweet and sour

• roundish

• slightly rough

color

taste

shape

texture

• color

• taste

• shape

• texture

Physical Properties

• do not change the chemical nature of the matter.

• readily observable

• help understand how the substance will behave under various conditions

Examples of physical properties:

• magnetism

• boiling and freezing and melting point

• malleability

• measurable qualities: density, mass, and volume

• viscosity

• size and shape and color

• texture

Chemical Properties

change the chemical nature of matter and are only seen during a chemical reaction

Examples of Chemical Properties

• combustibility (the energy released when it burns completely)

• reactivity (reacting with other chemicals- may form a precipitate or color change)

• Ph (measure of acidity or alkalinity of a solution)

• flammability (how likely to burn)

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Chemical

• Physical

Multiple Select

What are some things that happen to the sodium when it is put into the toilet? (*Choose all that apply*)

• It starts to fizz

• It catches on fire

• It explodes

Multiple Choice

True or False: One of Sodium's chemical properties it the ability to react with water.

• True

• False

Open Ended

How are physical properties different from chemical properties?