State of Matter
Makes up everything in our world
atoms
Two types of mixtures
heterogeneous and homogeneous
More Dense
Sinks or Floats
Sinks
Element, a pure substance has __ number of atoms
1
space taken up
volume
-shape is definite
-volume is definite
-atoms vibrate
solid
water
-two or more elements
compound
Two most important tools needed to calculate density
-graduated cylinder
-triple beam balance
Can only be separated by chemical means
Pure Substances
Can Physically Separate
Mixture
energy that drives everything, including state changes
thermal energy
see different substances, mixture without a uniform composition and properties
heterogeneous mixture
Particles are spread out
Low Density
molecules in a regular pattern that is rigid, the particles cannot slide past one another.
solid
physical combination of two or more different substances.
Mixture
has the most energy
-shape and volume is indefinite
gas
chocolate, Kool aid, sweet tea, air, tortilla, cement, vanilla ice cream, paper, olive oil, and glue
homogeneous mixture
Order the following 5 substances in order from least density to most density:
-water- 1 g/mL
-Salt Water- 1.025 g/mL
-Vegetable Oil-0.92 g/mL
-Rubbing Alcohol-0.785 g/mL
-Screw- 7.85 g/mL
Rubbing Alcohol
Vegetable Oil
Water
Salt Water
Screw
Solid > Liquid
Gas > Liquid
Liquid > Solid
Liquid > Gas
Melt
Condensation
Freeze
Evaporate
Element and Compound are
Pure Substances
Draw a picture of the molecular level of solid, Liquid, and gases
reveal
-Potassium
-sweet tea
-trail mix
-pure substance
-homogeneous mixture
-heterogeneous mixture
Students were asked to find the identity of a wooden object. The mass of the object is 48.0 grams. The dimensions of the block are shown below.
Length = 4.0 cm
Width = 2.5 cm
Height = 2.0 cm
What is the density of the wooden object?
Volume = 20 cm
Mass = 48 g
Density:
48/20= 2.4 g/mL
The higher the temperature the ____ the particles energy.
Which sample has the the higher temperature?
-A- moving 910 m/s
-B- moving 930 m/s
higher; B
D = M / V
Density Equation