Laws of Motion
How many laws of motion are there?
3
Solid
Energy in Motion
Kinetic Energy
What happens in an Exothermic Reaction?
Heat is given off
What kind of simple machine is a see-saw?
Force = mass * acceleration
Newton's Second Law
High-energy state of matter, has no fixed size or shape
Gas
Energy from position
Potential Energy
What happens in an Endothermic Reaction?
Heat is absorbed
They increase distance.
Every action has an equal and opposite reaction
Newton's 3rd Law
What happens when a liquid cools beyond a certain point?
It freezes/Turns into a solid
What law says that Energy cannot be created or destroyed?
The Law of Conservation of Energy
Is combustion (setting something on fire) an endothermic or exothermic reaction?
Exothermic (it gives off heat!)
What 2 simple machines are in an axe
Wedge/Inclined Plane and Lever
An object at rest stays at rest and an object in motion stays in motion.
Newton's First Law
Medium-energy state of matter, fixed size but can change shape
Liquid
Explain how energy is conserved when a ball rolls down a hill.
Potential energy at the top gets converted into kinetic energy at the bottom
Name two things made of matter and two things not made of matter
Depends.
How do you get more force out of a pulley system?
Name all of the forces acting on a car moving at a constant speed along the highway
Gravity, Air resistance, Normal Force, Thrust
Energy state of electrified gas, the most common state of matter in the universe
Plasma
Can a machine that creates free energy exist?
No, such a machine would contradict the Law of Conservation of Energy
What is a chemical reaction?
"A reaction between two or more substances that results in a change in their chemical composition or structure"
Name 3 simple machines in a Bicycle
Depends