Particles
What are atoms?
Atoms are very tiny particles that are everywhere
The Law of Conservation of Mass
That mass is neither created nor destroyed in chemical reactions.
BALANCED
Reference Point
an object that stays in place/permanent and is used to compare the motion of another object.
The person that discovered Law of Universal Gravitation?
Issac Newton
a molecule?
A group of atoms bonded together. Also known as chemical compound
What is an atom made of?
They are made of three particles named neutrons protons and electrons
Newtons 3 laws
In the first law, an object will not change its motion unless a force acts on it.
In the second law, the force on an object is equal to its mass times its acceleration.
In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
Clues that a Chemical Change has occurred
change of color, temperature, fire, etc. CANNOT BE UN DONE.
Friction
Opposite force to motion.
The resistance that one surface or object encounters when moving over another.
Endothermic will feel _____________
Cold
What are water particles made of?
They are made by two hydrogen atoms and 1 oxygen atom
The Kinetic theory?
The Kinetic theory is about the movements of the atoms inside the objects when it's cold or hot, etc.
Density Equation
Mass divided by Volume
Equation for Speed
Distance divided by Time
a heterogeneous mix or homogeneous mix or pure substance? (Look the picture)
Pure substance. There is only one type of molecule
Can a singular atom be divided?
No, they can't
the Hooke's Law?
The Hooke's Law, law of elasticity discovered by the English scientist Robert Hooke in 1660, which states that, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load
Velocity example with units
Distance divided by time, in a given direction
3m/s, east
Wave Frequency
number of waves pass a point in a given second.
an Uniform motion along a line?
Uniform motion along a line is the very special kind of motion that occurs when an object moves with unvarying speed in a fixed direction
What does a catalyst do?
Speeds up the reaction
Gravity?
Gravity is a force that pulls every object to itself
Balance this Equation
H2 + O2 ---> H2O
2H2 + O2 ---> 2H2O
What is the difference between Kinetic and Potential Energy.
Provide 1 example for each.
Kinetic = moving, sledding, swinging, throwing etc.
Potential = stored, top of roller coaster, highest point while swinging, wind up, etc.
Energy?
Energy is the ability to do work, which is the ability to exert a force causing displacement of an object