Introduction to Matter
the amount of matter in an object
mass
Is electrical conductivity a chemical or physical property?
physical property
a change that affects one or more physical properties of a substance
physical change
why is a compound considered a pure substance?
because all of the molecules in a compound are the same
What happens to the temperature of a substance DURING a phase change?
it stays the same
measure of the gravitational force on an object
weight
the ability of a substance to dissolve in another substance
solubility
when one or more substances change into entirely new substances with different properties
chemical change
made up of one or more of the same kind of atom chemically combined
element
What happens to the particles of a substance when energy is added?
they move faster
What is the volume of a box that measures 25 cm in height, 20 cm in length and 10 cm in width?
5000 cm³
a substance's ability to change into a new substance with different properties
chemical property
production of an odor is a sign of...
a chemical change
contain a variety of elements and compounds that are not chemically combined
mixture
dry ice is an example of...
sublimation
How can you find the volume of an irregularly shaped object?
water displacement
the ability of a substance to burn
flammability
after a chemical change occurs what happens to the mass of the substance(s)
Stays the same
Salad dressing is considered what type of mixture?
suspension
what happens to the mass of a substance when it changes state from liquid to gas
it stays the same
A rhyolite rock has a volume of 9.5mL. The density of the rock is 2.6 g/cm³. What is the mass of the rock?
mass = 24.7 g
what effect does observing a substance's physical properties have on the substance?
no effect.
A log's mass is 5kg. After burning, the mass of the ash is 1kg. Explain what happened to the other 4kg.
smoke, given off as gas.
Milk is considered what type of mixture?
colloid
what happens to the energy that is lost when water freezes?
it is lost to the environment.