STATES OF MATTER/ATOMS
What are the 4 states of matter?
Solid, Liquid, Gas, Plasma
What is a change that does not affect the identity of the substance?
Physical Change
What does the law of inertia say? (Newtons 1st law)
An object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force.
What is the difference between KINETIC and POTENTIAL energy?
Kinetic- Motion
Potential- Stored
Scale (Mass) and Graduated Cylinder (volume)
Which state of matter has the SECOND HIGHEST energy level?
Gas
Name all 5 indicators of chemical change.
Temperature change
Color change
Energy released
Precipitate
Gas (bubble)
What is Newton's Third Law?
Every action has an equal and opposite reaction.
Calculate the POTENTIAL ENERGY of a 3 kg boulder about to roll down a 12 meter tall mountain. Use gravity=9.8 m/s2
352.8 Joules
What two lab tools are needed to calculate speed?
Stopwatch (time). Meter Stick (distance)
If the atomic mass of Nitrogen is 15 and the atomic number is 7, how many protons does nitrogen have?
7 Protons
What happens to molecules/compounds in a chemical change
The compounds break apart and or recombine into to formations
In a net force diagram what math is done when arrows are pointing in the opposite direction?
The numbers are subtracted from each other.
Calculate the KINETIC ENERGY of a 4 kg skateboarder moving with a velocity of 3.5 m/s.
24.5 Joules
What tool is used to determine temperature change?
Thermometer
How many electrons are in the valence shell of a Carbon Atom?
4
Which Law tells us that chemical equations cannot be unbalanced? Hint: When chemical equations are unbalanced, you either create or destroy mass/matter.
The Law of Conservation of Mass/Matter
Calculate the force of a 112 kg football player who has an acceleration of 7.9 m/s2.
884.8 Newtons
If the total energy in the system is 100 J, how much POTENTIAL ENERGY does it have when the KINETIC ENERGY = 37 Joules and 10 Joules are released as friction/heat.
54 Joules
Newton Spring Scale
What is a chemical property of elements in the Alkali Earth Metal Category (column on the far left of periodic table)?
They are unstable and extremely reactive in water
What is the scientific chemical name for Vinegar?
Acetic Acid
Explain how the bottle rocket lab relates to Newton's 3rd Law.
The force of the water pushing out the rocket is equal to the force of the rocket on the water, which launches it up in the air.
If the Law of Conservation of Energy is true and matter cannot be created or destroyed, then why does a baseball eventually stop rolling across a field?
Energy is transferred to friction and heat. No energy is being created or destroyed.
Why is it not ok to place hot glass on a cold countertop?
The tempereature change will cause the glass to cool too quickly on the bottom. This causes the glass to crack or shatter.