Force
A push or a pull
Force
A force that opposes motion
Friction
Energy
Energy that can easily be replaced/replenished
Renewable Energy Sources
Something that stays the same in an experiment
Constants
True or False: A force causes an object to move, stop, or change direction.
True
What material could be used to slow down objects on a ramp?
Sandpaper, plastic wrap, any rough material such as crinkled aluminum foil
True or False: Energy can be created and destroyed.
False
Energy that cannot be replenished in a lifetime
Nonrenewable Energy Sources
What a scientist changes in an experiment
Independent Variable
True or False: Objects with different masses require the same amount of force to move.
False
Potential Energy
Light energy that comes from the sun
Radiant Energy
Coal, natural gas, and petroleum are examples of...
Nonrenewable energy sources
What a scientist measures in an experiment
Dependent Variable
All of the forces acting upon an object
Net Force
How can you increase the speed of an object?
Apply more force
Mechanical energy
Energy transformation means...
Changing energy from one form to another
A prediction that a scientist makes before the experiment begins
Hypothesis
Gravity does not push an object into the center of the Earth because...
The ground pushes up against the item, opposing gravity
The measure of the distance an object moves over a given amount of time.
Speed
Energy caused by the movement of electrons in a circuit
Electrical Energy
Name three types of renewable energy sources
Solar, wind, hydropower (water), geothermal, biomass (lumber)
Why does an experiment need to have only one independent variable?
A scientist would not be able to tell if the results came from one variable/change or another.