Name: __________________________
Date: ________________
Science 8th : Physical Science
Mrs. Padilla
Score _____/50
PART A: VOCABULARY WORD
_______1) Motion
a. is the rate of change of velocity
_______2) Displacement
b. is the product of its mass and velocity
_______3) Speed
c. distance an object travels per unit of time
_______4) Velocity
d. change in an object’s position relative to a reference
point
_______5) Momentum
e. distance and direction of the object’s change in
position.
_______6) Acceleration
f. includes the speed of an object and the direction of its
motion
_______7) Centripetal acceleration
g. acceleration toward the center of a curved or circular
path
Part B. Mention the equations of:
1) Speed = _______________________
2) Momentum =_______________________
3) Acceleration = ________________________
4) Changing velocity = ______________________
Part C. Fill in the blanks
1)
2)
3)
4)
On a distance-time graph, time is the _________________, and distance is the ______________.
The slope of a line plotted on a distance-time graph is the __________________.
The speed of an object increases if the acceleration is in the same direction as the ___________.
The speed of an object decreases if the acceleration and the acceleration and the velocity of the
object are in the _________________.
5) If and object is moving in a straight line, the change in velocity equals the _______________
minus the ________________.
Part D. Answer the following questions.
1) What is the difference between average speed and constant speed?
2) What the difference between position in science usage and position in common usage?
3) How can you calculate the average speed? Explain
4) How velocity and speed are different?
5) How to objects could have the same velocity but different momentums? Explain
6) Why you can’t use the acceleration equation for an object that changes direction?
7) Describe the difference between the total distance traveled and the displacement.