Matter
The fastest moving of the 3 common states of matter - it does not have a definite shape nor a definite volume.
What is a gas.
The middle of an atom.
What is the nucleus.
A change in temperature, formation of a precipitate, and evolution of a gas are all signs of this
What is a chemical reaction?
A force that pulls any objects with mass towards each other - more mass and smaller distance make it stronger
What is gravity
The only type of energy a rock sitting atop a cliff about to fall would have
What is potential energy.
Rusting iron is an example of this type of change
What is a chemical change.
The subatomic particles found in the nucleus with a neutral charge.
What are neutrons.
The materials you start with in a chemical reaction
What are reactants
The force that holds up air balloons and boats
What is buoyant force
This law states that energy cannot be created or destroyed
What is the law of conservation of energy
This state of matter has molecules that move the slowest and are closest together
What is a solid
The subatomic particle with a negative charge.
What are electrons.
The materials that you end with in a chemical reaction.
What are products?
A force of the table pushing up on your laptop with an equal and opposite force to the weight of the laptop
What is normal force
You apply 15 N of force to throw 3 different rocks - A 5 kg rock, a 10 kg rock, and a 20 kg rock. This is the rock that would fly the furthest
What is the 5 kilogram rock
Melting ice is an example of this type of change
What is a physical change
The subatomic particles found in the nucleus with a positive charge.
What are protons.
10 grams of hydrogen react with 5 grams of oxygen to produce water. The resulting water will weigh this much
What is a 15 grams (due to the law of conservation of matter)
The force that is present any time two surfaces are touching
What is friction
Considered active energy or energy of motion.
What is kinetic energy.
The atomic number tells you how many of these an element has.
What are protons?
A chemical reaction in which energy is released.
What is an exothermic reaction.
The type of force when 25 N push on an object from the right and 40 N push on it from the left
What are unbalanced forces
Potential energy is changed into this as an apple falls from a tree
What is kinetic energy.
(Also acceptable: Air resistance and heat due to air resistance)