Show:
Matter in Motion
Matter in Motion/Work and Power
Work and Power
Energy and Energy Resources
Energy and Energy Resources/Weathering
100
what are two ways that velocity can change?
What is speed and direction
100
why must you exert a force to pick up an object ?
What is to overcome the gravitational force between the object and earth
100
What are two things that a machine can change about how work is done?
What is force or distance
100
What is energy?
What is the ability to do work
100
Why are fossil fuels nonrenewable?
What is they are used up more quickly than they are replaced
200
How do you determine the net force on an object if all forces act in the same direction ?
What is Add the forces
200
how does mass affect gravitational force?
What is gravitational force increases as mass increases
200
How do the three types of levers differ from one another?
What is each class of lever involves a different set of mechanical advantage possibilities
200
What two kinds of energy can make up the mechanical energy of an object?
What is potential and kinetic
200
Where does nuclear energy come from?
What is radioactive elements
300
why is friction greater between surfaces that are rough?
What is they have more microscopic hills and valleys
300
How is gravitational force related to the weight of an object ?
What is the weight of an object is a measure of the gravitational force on the object
300
Which are different types of pulleys?
What is fixed, movable, and block and tackle
300
Which are six categories of energy?
What is thermal, chemical, electrical, sound, light, and nuclear
300
Where does geothermal energy come from?
What is underground thermal energy
400
what does the word static mean?
What is not moving
400
How is work calculated?
What is Force x distance
400
What is an inclined plane?
What is a ramp
400
How is elastic potential energy stored?
What is stretching
400
Which three things can cause abrasion?
What is water, sand, or other rocks
500
why do we use lubricants on moving parts ?
What is To decrease friction
500
How do machines make work easier?
What is they allow force to be applied over a greater distance
500
What disadvantage do compound machines have?
What is they are less efficient
500
Why is perpetual motion impossible?
What is energy conversions always result in waste thermal energy
500
What is a result of oxidation?
What is rust