force&motion
What is the formula used to calculate speed?
Speed = Distence/Time
What type energy does a ball sitting at the top of a hill have?
potential energy
What is the scientific formula used to determine pressure?
Pressure = Force/Area
What are the three primary subatomic particles that make up an atom?
Protons, neutrons, and electrons
In a written chemical equation, what is the starting substances located on the left side?
Reactants
Which of Newton's laws states that an object at rest will stay at rest unless acted upon by an unbalanced force?
Newton's First Law of Motion
What law states that energy cannot be created or destroyed, only transformed?
The Law of Conservation of Energy
What is the standard SI unit used to measure pressure?
The Pascal or Newtons per square meter (Pa, N/m2)
What is the fundamental difference between an element and a compound?
An element consists of only one type of atom, while a compound is made of two or more different elements.
What is the name of the numbers placed in front of a chemical formula used to balance an equation?
Coefficients
What is the difference between speed and velocity?
Velocity is like speed + direction
List the forms of energy transformations that occur when a battery-powered flashlight is turned on
Chemical Energy --> Electrical Energy --> Light Energy
Why does the pressure on your ears increase as you go deeper down in the swimming pool?
Because the weight of the water above you increases as you go down, adding more force on the same surface area.
What do elements in the same vertical column (group) of the periodic table have in common?
They share similar chemical properties and have the same number of valence electrons.
Which scientific law states that a chemical equation mustend up with the same amount of substance you started with?
The Law of Conservation of Mass
A skateboarder pushes backward on the ground to move forward. Which of Newton's laws explains this interaction?
Newton's Third Law of Motion
What type of wave requires a physical medium to travel through?
Mechanical wave
In terms of area and force, why does a sharp knife cut through food much easier than a dull knife?
Sharp knife has smaller surface area, adding more pressure than a dull knife.
What type of chemical reaction releases energy into its surroundings, usually in the form of heat or light?
exothermic reaction
Find product side of this single-replacement reaction equation:
Zn+2HCl --> ?
ZnCl2+H2
If a car accelerates from 0m/s to 30m/s in 6 seconds, what is its average rate of acceleration?
5m/s^2
Why does a black asphalt driveway feel much hotter on a sunny day than a concrete sidewalk right next to it?
Because darker surface absorb more sunlight
If you climb to the very top of a tall mountain, does the atmospheric pressure around you increase, decrease, or stay the same?
Decrease
An uncharged atom has an atomic number of 8 and a mass number of 16. How many protons, neutrons, and electrons does it have?
8 protons, 8 neutrons, and 8 electrons
Find the product side of this complete combustion reaction:
C3H8+5O2 --> ?
3CO2+4H2O