Show:
Chapter One
Chapter Five
Chapter Six
Chapter Seven
Chapter Eight
100
the steps scientists use to solve problems and answer questions
What is the scientific method?
100
a porch swing hanging from a porch roof
What is an example of a balanced force?
100
Both balls will hit the ground at the same time
If you drop a baseball and cannonball from the same height at the same time, which ball will hit the ground first?
100
the pascal
What is the SI unit for pressure?
100
a pulley
What is a grooved wheel that holds a cable?
200
the "stuff" that everything is made of
What is matter?
200
sand applied to an icy sidewalk
What is a helpful increase of friction?
200
They are in free fall
Why do astronauts appear weightless in space?
200
Ice is denser than air
What doesn't ice float in air?
200
It is used to overcome friction
IF the work output of a machine is always less than the work input, where does the missing work go?
300
testable
What must a good hypothesis be?
300
one has direction, the other does not
What is the difference between speed and velocity?
300
Force = mass x acceleration
What is the equation for Newton's second law of motion?
300
an area of greater pressure
When a fluid flows from area A to area B, then area A must be what?
300
Force x distance
What is the equation for work?
400
meterstick, stopwatch, balance, computer
What tools do scientists use to collect and analyze data?
400
remains constant, is a measure of matter, and is measured in kilograms
What are 3 descriptions of mass?
400
vertically downward
In what direction is a projectile accelerated?
400
the force per unit area increases
What happens when air is pumped into a tire?
400
energy
What is the rate at which power is transferred?
500
a model of a galaxy forming
What is an example of a conceptual model?
500
starting velocity, final velocity, and time
What 3 things are needed to calculate acceleration?
500
An object in motion will remain in motion unless acted on by an unbalanced force.
What is Newton's first law of motion?
500
force divided by area
What is the equation for pressure?
500
mechanical advantage
What is the number of times a machine multiplies force?