Science Chapter 2
expands
Ice has a lower density than liquid water. When water changes from a liquid to a solid it ______
mixture
A combination of two or more substances that are not chemically combined
electromagnetic energy
A form of energy that travels through space as waves
temperature
A measure of the average energy of motion of the particles of a substance
potential energy
Energy that is stored and held in readiness
solution\dissolved
Fruit punch is a ______ becuase the powder was ______ into the water
weight
The ______ of an object changes if the force of gravity changes
exothermic\heat
The burning of candle wax is an ______ change because of the _____ being released
exothermic change
a change in which energy is given off
endothermic change
a change in which energy is taken in
chemical energy
a form of potential energy that is stored in chemical bonds between atoms
mass
a measure of how much matter is in an object
weight
a measure of the force of gravity on an object
heterogeneous mixture
a mixture in which pure substances are unevenly distributed throughout the mixture
homogeneous mixture
a mixture in which substances are evenly distributed throughout the mixture
molecule
a neutral group of atoms that are held together by covalent bonds
compound
a pure substance made of two or more elements chemically combined
substance
a single kind of matter that is pure and has a specific set of properties
solution
a well-mixed mixture containing a solvent and at least one solute that has the same properties throughout
bonds between atoms
chemical energy is the potential energy of ______
chemical change
new substances are always formed when matter undergoes a _______
physical properties
the ability to dissolve in water and to conduct electricity are examples of ______
energy
the ability to do work or cause change
volume
the amount of space that matter occupies
density
the ratio of the mass of a substance to its volume
atom
the smallest particle of an element
thermal energy
the total potential and kinetic energy of the particles in an object
mass and volume
the two quantities needed to measure in order to determine to density of an object
kinetic\motion
Someone running along the side of the road is an example of ______ energy because it shows matter in ______
physical\evaporation
Dissolving some table salt in a glass of water is a ______ change. You can prove that by using the method of ______
kinetic energy
The energy of matter in motion
element
any of the more than 100 known substances that cannot be separated into simpler substances and that singly or in combination constitute all matter
matter
anything that has mass and takes up space
volume
density relates to the mass of a material to the material's ______
electrical energy
energy of electrically charged particles moving from one place to another
mass divided by volume
formula for finding density
volume times density
formula for finding mass
length x width x height
formula for finding volume
Conservation of Matter
in any chemical reaction matter changes form; it is neither created nor destroyed.
electromagnetic
light is an example of ______ energy
compound
water is an example of a ______
