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Science - Chapter 12 Les. 1 Vocab
Motion, Forces, and Energy
15
Science
4th Grade
03/18/2012

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Term
speed
Definition
the distance traveled in a certain amt. of time
Term
inertia
Definition
the tendency of obj. to stay in motion or stay at rest unless acted upon by other force
Term
friction
Definition
force between surfaces that slows or stops objects
Term
force
Definition
any push or pull that makes object start or stop moving, speed up, slow down, or change direction
Term
energy
Definition
ability to do work
Term
work
Definition
the use of force to move an obj. a certain distance
Term
potential energy
Definition
stored energy because of an object’s position
Term
kinetic energy
Definition
moving energy
Term
frame of reference
Definition
an obj. that seems to not be moving
Term
acceleration
Definition
changing direction or speed (slowing down or speeding up)
Term
chemical, electrical, light, mechanical, thermal, nuclear
Definition
What are some forms of energy other than kinetic and potential?
Term
something needs to MOVE
Definition
What needs to happen for work to be done?
Term
amout of gravity
Definition
depends on how much MATTER is in obj. and how CLOSE objs. are together
Term
speed of object
Definition
distance ÷ time = speed
Term
distance of object
Definition
speed X time = distance
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