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5 Science B2

Chapter B2 Science Vocabulary

QuestionAnswer
SPEED A MEASURE OF HOW FAR SOMETHING TRAVELS IN A CERTAIN PERIOD OF TIME.
KM/HR THE NUMBER OF KILOMETERS (KM) SOMETHING CAN TRAVEL IN ONE HOUR (HR).
VELOCITY A MEASURE OF SPEED IN A CERTAIN DIRECTION.
INERTIA THE TENDENCY OF AN OBJECT TO STAY AT REST OR TO REMAIN IN MOTION UNLESS AN OUTSIDE FORCE CAUSES A CHANGE.
ACTION FORCE THE MOVEMENT FORWARD.
REACTION FORCE THE OBJECT PUSHED AGAINST OR MOVED IN THE OPPOSITE DIRECTION.
GRAVITY A FORCE THAT ACTS TO PULL PAIRS OF OBJECTS TOGETHER.
MASS THE AMOUNT OF MATTER IN AN OBJECT.
WEIGHT THE FORCE GRAVITY EXERTS ON AN OBJECT'S MASS.
ACCELERATION RATE OF CHANGE OF SPEED OR DIRECTION OF MOVEMENT.
ZERO ACCELERATION WHEN VELOCITY ISN'T CHANGING.
FRICTION A FORCE THAT RESISTS THE MOVEMENT OF ONE SURFACE PAST ANOTHER SURFACE.
RESISTANCE A FORCE THAT TENDS TO OPPOSE MOTION.
AIR RESISTANCE FRICTION CAUSED BY GAS MOLECULES IN THE AIR HITTING AN OBJECT AND SLOWING IT DOWN.
STREAMLINE TO DESIGN SMOOTH, ROUNDED SURFACES ON AN OBJECT SO IT SLIPS THROUGH THE AIR WITH THE LEAST POSSIBLE RESISTANCE.
ROLLING FRICTION THE FRICTION THAT OCCURS BETWEEN THE SURFACE OF A ROUND OBJECT AND ANOTHER SURFACE.
Created by: smurray817
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