Classifying Matter
Substances formed from atoms of two or more elements are called?
compounds
Breaking glass is an example of what type of change?
physical
What is the mass of matter occupied within a particular volume called? (Represented with the function D=m/v)
Density
This has no definite shape but has a definite volume.
What is a liquid?
Define matter
anything that has mass and takes up space
What type of mixture is sand?
The color of pen ink is a ______.
physical property
If I was multiplying 12.0 by 0.04360 how many significant figures would my final answer have?
three
A fluid's resistance to flow is called what?
viscosity
This explains the motion of particles in matter
kinetic energy
Name two of the six facts about matter that they particle model of matter helps explain.
particles make up everything
particles are attracted to one another
particles have spaces in between them
particles are in constant motion
if you heat up particles in a substance they will move faster
if you cool down particles in a substance they will move slower
What is the property called that explains a substance's ability to reflect light?
luster
A sample of aluminum has a volume of 14.8mL and a mass of 39.96g. What is the density of aluminum? (REMEMBER SIG FIGS!)
2.70 g/mL
What is the name of the state of matter that make up the sun and stars?
Plasma
What does the law of conservation of mass state?
matter cannot be created or destroyed
Sugar is made from a combination of hydrogen, oxygen, and carbon. How do you know sugar is a compound?
What is the difference between a physical change and a chemical change?
physical change - substance does not change identity; chemical change - substance changes to another substance
What will be the mass of an iron bar with a volume of 35.74mL? Iron's density is 7.874 g/mL. (REMEMBER SIG FIGS!)
281.4 g
What is the temperature called when a solid begins to liquefy?
melting point
What are the two main ways in which we classify matter?
as a pure substance or as a mixture
Explain the difference between a homogeneous mixture and a heterogeneous mixture.
Homogeneous - materials mixed evenly throughout; Heterogeneous - mixture of easily distinguished materials
Describe two indicators that a chemical change has occurred.
formation of a gas
formation of a precipitate
color change
odor change
rust
temperature change
How much space will a sample of gold with a mass of 175.6 g occupy? The density of gold is 19.3 g/mL. (REMEMBER SIG FIGS!)
9.10 mL
What is the difference between evaporization and boiling?
Evaporization- occurs at the surface of a liquid
boiling- rapid evaporization
Because melting point and freezing point describe the same transition of matter, in this case from liquid to solid (freezing) or equivalently, from solid to liquid (melting).