How can we help?

You can also find more resources in our Help Center.

Chapter 15 Science

Mrs. Day's class 2012.
STUDY
PLAY
Element
A pure substance made of only one kind of atom.
Compound
A substance in which the atoms of two or more elements are chemically bonded.
Mixture
A material with two or more substances that can easily be separated by physical means.
Solution
A homogeneous mixture of two or more substances.
Homogenous
A mixture in which the substances are the same throughout.
Heterogeneous
A solution that contains two or more substances blended evenly throughout.
Colloids
Mixtures with large particles not heavy enough to settle.
Suspensions
Heterogeneous mixtures in which visible particles settle.
Law of Conservation of Mass
The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change.
The Law of Conservation of Mass (Simplified)
Matter is neither created or destroyed during a chemical change.
Chemical Change
The change of one substance to another.
Physical Change
A change in size, shape or state of matter.
Chemical Change
A rapid release of energy is a clue that a ____ occurred.
Heat, Light, Sound, Bubbles, Rust
Clues that a chemical change has taken place.