Science and Forces
Define force
A push or a pull
What is the force that slows down two objects rubbing together?
Friction
Mass is the amount of _____ in an object
Matter
What do you call a substance that you put between two surfaces (usually a liquid) that reduces friction?
Lubricant
What type of force is pressure?
Pushing
A ______ is something that changes the motion and/or shape of an object.
force
Who was the scientist that discovered that all things fall at the same speed?
Galileo
What is the tendency of a moving object to resist change called?
Inertia
For every action, there is an equal and ______ reaction.
Opposite
True or False: Buoyancy can happen in liquid and air
True
How do we measure force?
Newtons
The greater an object's ____, the greater the gravitational pull.
Mass
_____is the distance an object moves in a certain amount of time.
Speed
What direction does centripetal force point?
Toward the center
Define pressure
The amount of force (push) on a certain surface area
Name three dangerous forces that can impact our lives.
Tornadoes, volcanoes, lightning
Define Mass
The amount of "stuff" or matter in an object
What is the formula for speed?
Speed= distance/time
What force keeps the moon in orbit around the Earth?
Centripetal
What is the formula we use to find the density of an object?
Density= Mass/Volume
Name the 5 steps of the scientific method
Ask a question, form a hypothesis, experiment, analyze data, share results
If you drop a feather and a bowling ball at the same time, will they fall at the same speed? Why or why not?
If there is no air resistance, they will fall at the same speed. If there IS air resistance, they will fall at different speeds.
What is Newton's Second Law of Motion?
Force=Mass x Acceleration
Name three things that friction does
Slows things down, produces heat, and causes wear
What is the formula we use to find pressure?
Pressure = Force (push)/ Area (surface)