Name __________________________________________________ Period _________
Physical Science Preassessment
1. An airplane travels 1757 km in 2.25 hr. What is its speed?
1757 km
= 780.89 km hr → significant _ figures = 781 km hr
2.25hr
2. A top fuel dragster covers the .250 mile in 3.87 seconds. What is
its speed?
0.250mi
= 0.064599 mi s → Sig . _ Digs = 0.0646 mi s
3.87 s
3. A rifle bullet travels 1655 feet per second for 2.73 seconds. How
far did the bullet travel?
1655 ft
× 2.73s = 4518.15 ft → Sig _ Digs = 4520 ft
s
4. A rocket travels at 3,125 meters per second. How long has it
been traveling if it crosses a distance of 10 kilometers.
10,000m
= 3.2 s → Sig _ Digs _(all _ zeros _ significant ) = 3.200 s
3,125 m s
Come up with a valid hypothesis based and the variables involved in an experiment based
on this question: “What factors affect the braking distance of a car?”
Hypothesis: Type of brake, mass of car, type of road, wet/dry, etc. will make the braking
distance more/less
Variables:
1-mass
2-type of brake
3-Tire type
4-wet/dry
5-reaction time
6-etc
Come up with more than 6 valid variables- get bonus points
Completion
Complete each sentence or statement.
1. The value calculated by dividing the distance traveled by the time taken to travel that
distance is referred to as ___speed_________________.
2. The speed you have at a specific point in your journey is best called
___________instantaneous_________ speed.
Matching
Match the following terms with the correct definition. There is one extra term that will
not match any of the definitions.
a. hypothesis
b. variables
c. procedure
d. controlled
e. trial
f. research question
___e_
___c_
___a_
___d_
___b_
4.
5.
6.
7.
8.
Problem
Occurs each time an experiment is run
A collection of all the techniques you use to do an experiment
An educated guess about what will happen in an experiment
Description of an experiment in which only one variable at a time is changed
Factors that affect the results of an experiment
9. A race car travels at a constant speed. Position and time data are recorded. A graph is
prepared using the data. Use this graph to determine the speed of the race car.
75m/s
10. A boy riding a bicycle travels at 10 miles per hour for 3 hours. He stops to rest for one
hour and then continues his ride. For the next hour he rides at a speed of 20 miles per
hour. During this ride, what was the rider's average speed for the five hour period?
Other
11. Experiments are done to discover the relationship between variables. When results are
graphed, the graph may indicate a strong, weak or inverse relationship or no relationship
at all.
Label each graph with the words strong, inverse, weak or none to indicate the type of
relationship shown by the graph.
A.
B.
C.
D.
A- inverse relationship B- strong relationship C-no relationship D- weak relationship
12. Listed below are descriptions of the motion of several objects. If they are accelerating
answer YES next to the description of the object. If they are not accelerating answer NO.
a. __no
A car traveling on a turnpike at a 60 mph with its cruise control engaged
b. __yes A motorcycle whose brakes have been applied
c. __yes A baseball dropped from the roof of a building
d. __yes A girl on a skateboard going around a corner at a speed of 3 m/sec
e. __no
A tractor-trailer parked in a rest area