Honors Chemistry - Midterm REVIEW Flashcards
What is chemistry?
A study of the materials in the universe and the changes they undergo
List the steps of the scientific method (there are 8)
Objective Research (background) Hypothesis Procedure Data Analysis Conclusion Communicate Results (discuss)
What are the two types of observations
Qualitative Observations
Quantitative Observations
Qualitative Observation ex:
blue liquid, viscus liquid
Quantitative Observation ex:
crystals - 2.02g
The state of matter for an object that has neither definite shape nor definite volume
gaseous
The state of matter for an object that has a definite volume but not a definite shape
liquid
The state of matter for an object that has both definite volume and definite shape is
solid
Anything that has mass and volume is called
matter
cooking an egg
chemical change
boiling water
physical change
ironing a shirt
physical change
burning gasoline
chemical change
decomposing water
chemical change
evaporating alcohol
physical change
sanding a table top
physical change
grinding grain
physical change
fermenting fruit juice
chemical change
dissolving sugar in water
physical change
cooking an egg involves…
a chemical change
evaporating water is a…
physical change
Helium is very nonreactive
chemical property
boiling water involves…
no chemical change
sugar dissolves in coffee is a…
physical change
a “tin” can rusts is a…
chemical change
digesting pizza
chemical change
In a chemical change,
the products are different substances from the starting materials
baking a cake
chemical change
lighting a match
chemical change
driving a car
chemical change
cookies burn in the oven
chemical change
a banana ripens
chemical change
leaves turn colors in the fall
chemical change
water condenses on a mirror
physical change
grinding coffee beans
physical change
coffee spilled on a shirt
physical change
an ice cube melting in a drink
physical change
All _____ are ______ changes
phase
physical
If iodine melts at 114C and boils at 184C, what is its physical state at 120C?
solid
If iodine melts at 114C and boils at 184C, what is its physical state at 98C?
liquid
If iodine melts at 114C and boils at 184C, what is its physical state at 250C?
gas
chemical property of gold
gold is an inert (nonreactive) metal
paper burning
chemical change
water boiling
physical change
gasoline evaporating
physical change
butter melting
physical change
sugar dissolving in water
physical change
compound
always has the same composition
helium
element
A compound can consist of one kind of element (T/F)
False
oxygen
element
silver
element
the air in this room
mixture
elements, compounds, pure water, and carbon dioxide are all…
pure substances
a solution of..
gases
a mixture of..
solids
a homogenous mixture is called…
solution
table salt
a compound
chlorine gas
element
sand in water
a heterogenous mixture
petroleum
a homogenous mixture
caffeine
a homogenous mixture
water is an example of
a compound
a solution can be distinguished from a compound by its
variable composition
iron
element
14K gold
mixture
pure silver
element
aluminum
element
distilled water
compound
tap water
mixture
brass
mixture
tungsten
element
sodium chloride
compound
air is a…
mixture
homogenous mixture ex:
vodka
helium
element
the process of filtering a sand-saltwater mixture is a _____ process
physical
Breaking a compound into its constituent elements requires
chemical methods
separating a heterogenous mixture into pure substances requires
physical methods
separating a homogenous mixture into pure substances
physical methods
the light on the candle burns until a bell jar is placed over it for a period of time is a
chemical change
when a few drops of red food coloring are added to a beaker of hot water, the water immediately turns red is a
physical change
dry ice sublimes when left on the demo table in lecture is a
physical change
liquid nitrogen dumped onto the floor vaporizes at room temperatures is a
physical change
gasoline is a
homogenous mixture
pure water
heterogenous mixture
jar of jelly beans
heterogenous mixture
soil
heterogenous mixture
copper metal
heterogenous mixture
diamond is a ______ state of matter
solid
A _____ change involves change in one or more physical properties, but no change in the fundamental components that make up the substance
physical
A _____ change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances.
chemical
water is a
pure substance
carbon is a
pure substance
gold is a
pure substance
ammonia is a
pure substance
water is a
mixture
ammonia is a
compound
How many decimeters in one meter?
10
What is the fundamental SI unit of mass in the metric system?
kilograms
pure water is a…
compound
