any push or pull that causes an object to move, slow down, stop, or change direction.
What is the definition of a force?
100
the reason only one variable should be used
What is so you can have a valid test of your hypothesis and know what caused a change?
100
the name commonly given to the first law
What is inertia?
100
a change in velocity
What is acceleration?
100
why two cars that collide with fly in opposite directions the same direction
What is because they have the same mass?
200
a change in direction
What is motion?
200
the reason a hypothesis should be tested out with an experiment?
What is to be sure the guess is correct?
200
the first part of the first law
What is an object at rest won't move unless force is applied?
200
an objects speed and direction
What is velocity?
200
why a big man who bumps into a small girl makes her fall to the ground
What is because he has more mass?
300
a force that pulls everything to the core of the Earth
What is gravity?
300
keeping everything controlled
What are constants?
300
the second part to his first law
What is an object that is moving will stay moving in the same straight line, in the same direction, and at the same speed unless a force is applied?
300
the distance traveled in a period of time
What is speed?
300
for every force applied there is...
What is an opposite and equal reaction?
400
a force that goes against motion by slowing it down or stopping it
What is friction?
400
something to compare your test to
What is a control group?
400
the reason a bowling ball is hard to stop and move
What is because it has a lot of inertia?
400
as force increases or mass decreases...
What is acceleration increases?
400
the reason you are still in your chair and not moving when you're sitting
What is because as I push down on my chair, the chair is pushing up at me with an equal amount of force?
500
equal sized forces in opposite directions
What are balanced forces?
500
the thing that you changes as a result of an independent variable
What is a dependent variable?
500
the reason things move
What is because they have unbalanced forces?
500
as force decreases or mass increases...
What is acceleration decreases?
500
the explanation of why a bed exerts a force on you while you are lying on it
What is the bed exerts an opposite but equal force to the one I'm exerting as I lay on it? If the forces weren't equal, I would break it or be pushed up in the air!