Matter and energy Flashcards
What does COAST stand for?
-Collect and Organize
-Analyze
-Solve
-Think about it
what are elements?
anything on the periodic table
what is a compound?
made of more than one element chemically bound together
what is a mixture?
more than one element/compound
what is a homogenous mixture?
uniform throughout
what is a heterogenous mixture?
not uniform throughout
what are the properties of a solid?
same shape and volume regardless of container
what are the properties of a liquid?
indefinite shape and constant volume
what are the properties of a gas?
indefinite shape and volume
what are physical properties?
anything measured or determined about something that does not change
what are the rules for significant figures (4)?
- zeros at the beginning of the value are never significant because all they do is set the decimal place
- zeros after a decimal place and after a nonzero digit are always significant
- zeros at the end of a value that contains no decimal point are not significant. They are significant if there is a decimal place
- zeros between significant digits are always significant
what is density?
mass per unit volume physical property
1 gigameter = ____ meters
1 x 10^9 meters
1 meter = _______ picometers
1 x 10^12 picometers
1 meter = _____ nanometers
1 x 10^9 nm
1 megameter = _____ meters
1 x 10^6 meters
1 kilometer = _____ meters
1000 meters
1 meter = _____ centimeters
100 cm
1 meter = _____ millimeters
1000 mm
1 meter = _____ micrometers
1 x 10^6 um
what type of mixture would tomato soup be?
homogenous
what type of mixture would chicken noodle soup be?
heterogenous
what is 3 meters in millimeters
3000 mm
how many meters are in 40000 kilometers?
4 x 10^7
what is 3 meters in millimeters
3000 mm
how many meters are in 40000 kilometers
4 x 10^7 m
physical or chemical: burning wood
chemical
physical or chemical: dying water green
physical
extensive properties of a pure substance depend on sample size whereas intensive properties are characteristic of that substance. Which of these properties are intensive?
-color
-mass
-density
color and density
identify the best match between the dimension/quantity and its correct SI base unit
a. mass and gram
b. length and kilometer
c. time and minute
d. temperature and celsius
e. amount of substance and mole
e. amount of substance and mole
which of the following shows the correct relationship between these metric units of length or distance?
a. 1 km = 100 m
b. 1mm = 10 cm
c. 1 nm = 10^9 m
d. 10^6 um = 1 m
d. 10^6 um = 1 m
