Old Stuff
A push or pull on an object.
What is force?
Baking bread in an oven is an example of this type of change. (Chemical or physical?)
What is a chemical change?
A positively charged particle in the nucleus of an atom.
What is a proton?
H2O
What is water?
This type of primate is endemic to Madagascar.
What is a lemur?
Energy of motion
What is kinetic energy?
Name three ways you can tell a chemical change is occurring.
Stank
Color change
Gas emission (bubbles/fizz)
Energy flow (temperature change, light/sound)
A neutral particle in the nucleus of an atom.
What is a neutron?
Ca
What is calcium?
\frac{mass}{volume}
What is density?
Stored energy
What is potential energy?
Substances that you combine in a chemical reaction.
What are reactants?
Atomic number tells you how many of this particle an atom has.
What is a proton?
K
What is potassium?
This occurs when a solid becomes a gas without becoming a liquid first.
What is sublimation?
The two things a vector quantity has.
What are magnitude and direction?
New substances formed in a chemical reaction
What are products?
A neutral atom will have as many ________________ as protons.
What are electrons?
CO2
What is carbon dioxide?
A planet outside of our solar system is called this.
What is an exoplanet/extra-solar planet?
Explain all three of Newton's Laws of Motion.
First law-an object will not change its motion unless a force acts on it.
Second law-the force on an object is equal to its mass times its acceleration.
Third law-when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
A chemical reaction that releases heat and causes its surroundings temperature to rise
What is exothermic?
Atomic mass is not a whole number for this reason.
NH3
What is ammonia?
When heat moves from two things at different temperatures and must be touching
What is conduction?