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Pressure
Forces and Motion
Newton's Law's of Motion
Buoyancy and Density
PSSA Review
100
Pressure decreases as the area _________
What is increases
100
Define force
What is a push or pull
100
There are two moving trains, the blue train is moving at 4m/s and the second train is moving at 2m/s, the trains collide and their speeds are switched, this is because what was saved
What is the momentum
100
This gives objects the ability to float
What is buoyancy
100
This gene masks a recessive gene
What is the Dominant gene
200
A material that can easily flow
What is fluid
200
When equal forces are acting on the same object in opposite directions (Think Ivan and I pushing on the desk together)
What is a balanced force
200
For every action there is an equal but what?
What is opposite reaction
200
the equation for density
What is mass/volume
200
This is the signal that sends information up to the brain
What is input
300
As you go higher in elevation, air pressure does this
What is decreases
300
SI unit used to measure force
What is Newton
300
When a driver slams on his breaks, and then the passenger in the car keeps moving until the seat belt stops the him from moving, this is an example of what?
What is Inertia
300
When can comparing two objects' densities you can tell whether the objects will do what in water
What is sink or float
300
Which type of moving water provides the best environment for organisms to decompose dead organic matter: (Think about Bernoulli's Principle) a) a steep mountain stream that flows when snow melts b) a shallow river with cold clear water and sandy bottom c)a slow moving river with a wide, open channel d)a rapidly moving stream with a narrow, steep channel
What is C
400
This instrument is used to measure pressure
What is a barometer
400
An object is in motion if it changes position relative to a what
What is a reference point
400
The greater the mass of an object, the greater its what
What is inertia
400
If an object's weight is greater than the buoyant force the object will do this
What is sink
400
What is kinetic energy?
What is energy in motion
500
What states that as the speed of a moving fluid increases the pressure decreases
What is Bernoulli's principle
500
How to calculate speed
What is speed=Distance/Time
500
Newton's second law of motion states (just the equation)
What is Force=mass x acceleration
500
this states that the buoyant force acting on a submerged object is equal to weight of the fluid the object displaces
What is Archimedes' Principle
500
What two factors have the greatest influence on tides
What is the moon's gravity and Earth rotating each day