Compound Chemistry
What is a compound?
A pure chemical substance with two or more different elements combined.
What is the difference between a mixture and a compound?
Mixtures are compounds that are not chemically combined but rather physically mixed.
The study of motion is called the study of ______?
mechanics
What are alloys?
Mixtures of different metals.
What is a force?
A push or pull on an object.
What is a crystal?
A solid with regular, repeating arrangements of atoms.
What is a heterogeneous mixture?
A mixture where the individual parts can be easily seen.
What is Newton's first law of motion?
Something at rest stays at rest unless something forces it to move, and something in motion stays in motion in a straight line unless something forces it to stop moving.
What is acceleration?
The change in speed or direction of something is going.
What is the pH of pure water?
7 neutral
What is a polymer?
A molecule made of repeating small molecules combined, for example rubber.
What is a homogeneous mixture?
A well-mixed mixture in which the individual parts cannot be seen as separte.
What is Newton's second law of motion?
Force is what causes an object to change speed or direction. The change is resisted by the mass of the object.
If you were riding in your car with books on your lap, what would happen if your car suddenly stopped? Why?
Your books would fly forward because of inertia.
What is an endothermic reaction?
A chemical reaction during which heat energy is absorbed.
What is a chemical reaction?
A reaction that occurs when two or more chemical substances interact with each other and change into different chemical substances.
What is a concentrate?
A solution that has a large amount of solute in the solvent.
What is Newton's third law of motion?
For every action, there's an equal and opposite reaction.
What are some ways to separate the component parts of a mixture?
Evaporation, filtration, sifting, magnetism, chromatography
What is a exothermic reaction?
A chemical reaction during which heat energy is released.
What is a physical reaction?
A physical change that does not change the chemical substance but only the appearance of the substance.
What is a saturated solution?
A solution in which no more solute can be dissolved in the solvent.
Who was Isaac Newton?
A great creationist physicist and mathematician; discoverer of the spectrum of light and the law of motion, gravity, and cooling; inventor of the reflecting telescope; coinventor of mathematical calculus.
Which law of motion explains why the shooter marble rolls in a straight line?
Newton's first law of motion. Something at rest stays at rest unless something forces it to move, and something in motion stays in motion in a straight line unless something forces it to stop moving
Why do marbles that are stationary suddenly start rolling when the shooter strikes them?