Atomic Theory
What is the smallest unit of matter that still retains the properties of an element?
Atom
Define a Pure Substance and give me 2 examples of pure substances.
Make up of ONE type of element or ONE type of compound (molecule)
What is the Formula to Calculate Density?
Mass Divided by Volume!
Cooking food: Chemical or Physical Change?
Chemical
Explain what the Law of Conservation of Energy Means...
Energy cannot be created or destroyed, only transformed
What are the three main particles that make up an atom? and their charges!
Protons (Positive), Neutrons (No Charge), Electrons (Negative)
Define a Homogenous mixture, and give 2 examples
A mixture made of 2 or more pure substances and evenly mixed where you CANNOT see the different parts
An object more dense than 1 will ________.
An object less dense than 1 will ________.
Sink, Float
How do higher and lower temperatures affect the speed of chemical changes?
Higher (Hotter) = FASTER
Lower (Colder) = SLOWER
List at least 5 different forms of Energy
Answers may vary
What does the Atomic Number of an Atom tell you?
The number of Protons AND Identity of the atom
Define a Heterogenous Mixture and give 2 examples
A mixture made of 2 or more pure substances that is NOT evenly mixed where you CAN see the different parts
Define Solubility...
Ability to be dissolved in water
What does the Law of Conservation of Mass State?
Mass (Matter) CANNOT be created or destroyed, only transformed, rearranged.
Heat (Thermal Energy) always flows from ______ to ________.
What is included in the Atomic Mass Number?
Average total number of Protons and Neutrons
What happens to particle size, speed, and amount when matter is heated.
Speed Increases
Size and Amount stays the SAME
Define Mass and Define Volume
Mass: Amount of Matter
Volume: Amount of Space an Object Takes up
Temperature Change
Color Change
Gas Production
Sound Produced
Light Produced
Odor Produced
Define Kinetic and Potential Energy, and give at least 1 example of each
Kinetic: Currently in MOTION
Potential: Not in motion, but has potential to move
Elements in the Same GROUP of the Periodic Table, have the same number of...
Valence Electrons
What is the levels of Acids on the pH Scale? What is the Level of Bases? What is Neutral?
Acids: 0-6, Bases 8-14, Neutral 7
Explain the difference between mass and weight. Which on Changes on the Moon?
Mass: Amount of Matter
Weight: Force of Gravity
Explain the difference between a PHYSICAL change and a CHEMICAL Change.
Give one example of each
Physical: Size, Shape, Appearance
Chemical: changes to new substance with different chemical properties
What happens to kinetic energy when it encounters Friction?
It transforms into Thermal Energy and will stop moving