Modules 1-2
Any factor that changes in experiment.
What is variable?
The number of protons in an atom
What is the atomic number?
This type of bond is a force of attraction between atoms or groups of atoms.
What is a chemical bond?
The distance an object travels plus the direction from the starting point.
What is displacement?
A force that results when surfaces of objects rub against each other and opposes motion.
What is friction?
DAILY DOUBLE
A pure substance that cannot be broken down into a simpler substance and contains only one type of atom
What is element?
The sum of the protons and neutrons in the nucleus of an atom.
What is the mass number?
When water is a(an) ____ its molecules are farther apart than when it is a(an) ____.
What is solid and liquid?
The slope of the line on a speed-time graph shows this
What is the acceleration?
The motion of an object where it is falling solely under the influence of gravity
What is free fall?
This variable is the one that the experimenter changes or manipulates (All other variables are kept constant.)
What is an independent variable?
DAILY DOUBLE
Atoms of an element with the same number of protons, but different number of neutrons.
What are isotopes?
A chemical bond in which two atoms share one or more pairs of valence electrons.
What is a covalent bond?
In experiment 6.1, using eggs, we found that ______ tells us how quickly and in what direction an object is moving in relation to a reference point.
What is velocity?
The mathematical equation for Newton’s Second Law of Motion
What is F=m x a (Force = mass x acceleration)?
The smallest unit of a chemical compound composed of two or more atoms bonded together
What is a molecule?
These gases are the least reactive.
What are noble gases?
DAILY DOUBLE
A chemical reaction that absorbs energy from its surroundings is a(an)_____ reaction, and a chemical reaction that radiates energy to its surroundings is a(an) ______ reaction.
What are endothermic and exothermic?
This saint listed the presence of motion as one of the five arguments for the existence of God.
Who is James Saint Thomas Aquinas?
DAILY DOUBLE
Friction that opposes the initiation of motion
What is static friction?
Observations made using 5 senses
What is qualitative observation?
What are valence electrons?
Compounds that are formed when atoms share electrons in covalent bonds.
What are molecular compounds?
DAILY DOUBLE
A point against which direction is measured
What is a reference point?
The tendency of an object to resist changes in its velocity
What is inertia?