alters only state or appearance; not composition (subliming or dissolving)
a change that occurs when a substance changes composition by forming one or more new substances (rusting, changing color, burning)
characteristics displayed without changing composition
characteristics displayed only by changing composition via chemical change
energy due to motion, including thermal energy
energy due to temperature
energy due to position or composition
action of force through distance
capacity to do work; can be converted from one form to another
law of conservation of mass
energy is neither created nor destroyed
What are the properties of matter determined by?
the atoms and molecules that compose it
submicroscopic particles; fundamental building blocks of ordinary matter
2 or more atoms attached together in a specific geometrical arrangement; come in different shapes and patterns and are made up of atoms
science that seeks to understand behavior of matter by studying behavior of atoms and molecules
particles closely packed, but have some ability to move around; fixed volume but not shape, incompressible, able to flow
solids with particles randomly distributed without any long range pattern (plastic, glass, or charcoal)
solids with particles arranged in patterns with long range repeating order (salt, diamonds, sugar)
particles packed tightly together in fixed positions; can vibrate but not move, fixed shape and volume, do not flow and are not compressible
substance that has and occupies volume and has mass; classified by it's state and composition
things in nature are the way they are and behave the way they do. explains WHY
statement that summarizes all past observations and predicts future observations; describes what happens; can be tested by experiments
set of highly controlled procedures designed to test whether an idea about nature is valid; generates observations that either validate or invalidate hypothesis
tentative interpretation or explanation for observation; can be tested to be proven wrong
observation that includes numbers
observation of characteristics
particles have a lot of room to move around each other; take on shape and volume of container; compressible
types of particles, arrangement of particles, attractions and attachments between particles
first component, composition doesn't change from one sample to another
2 or more components, composition may vary from one sample to another
can not be chemically broken down into simpler substances
can be chemically broken down into simpler substances
uniform composition throughout; also called a solution (salt water)
composition varies throughout (too much salt, some falls to the bottom, leaving uneven composition)
separation technique involving a funnel
bunson burner heats flask, sending gas down a tube while it cools into another flask
lbs to grams
g/ml or g/cm^3
how do you round when measuring?
round one digit past the graduation mark
amount of substance (used to identify substances)
amount of substance (cannot be used to identify substances)
ratio of mass to volume
non placeholding digits
value known with complete certainty
a description of how close a measurement is to the true value of the quantity measured
how close a series of measurements are to one another
using units as a guide to solve problems (always include units in calculations)
fractional quantity with units converting from unit on bottom and converting to unit on top
unpredictable error with no obvious pattern
a repeated error which affects every measurement to the same degrees - caused by a technique problem or instruments.
How many km are in a mile?
Law of multiple proportions
WHEN 2 ELEMENTS (A+B) FORM 2 DIFFERENT COMPOUNDS, MASSES OF B THAT COMBINE WITH 1g OF A CAN BE EXPRESSED AS A RATIO OF SMALL WHOLE NUMBERS.
Law of definite proportions
the law that states that a chemical compound always contains the same elements in exactly the same proportions by weight or mass
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.