PHYSICAL SCIENCE:
practice test
1. Which of
the following is true?
a) with
enough evidence a hypothesis can become a law
b) with
enough evidence a theory can become a law
c) with
enough evidence a hypothesis can become a theory
d) all
of these are true
2. A tissue
sample is found that has a cell structure unlike that of any known organism
from
the
planet earth. The sample is available
for analysis. This evidence should be
considered
a)
scientific b) not scientific c) silly d)
crazy
questions
3 & 4 refer to the following experiment
To determine
how sound levels change with distance from the source, a portable stereo was
placed in the middle of the football field.
The loudness of the sound was measured at different distances from the
speaker.
3. What
was the Manipulated variable?
a)
loudness of sound at different locations
b)
volume setting on the stereo
c)
distance from the speaker
4. What
would have been a controlled variable?
a)
loudness of sound at different locations
b)
volume setting on the stereo
c)
distance from the speaker
5. How
many significant figures are there in the following numbers?
a)
2,000 ___________ b)
0.002050 ____________
c)
130.0 ___________ d) 0.000005 ____________
6.
Calculate the following:
9.34 ´ 10 - 5 ´ 4.30 ´ 10 - 7 = __________________
7. Write the answer to the following
calculations, and then round the answer to the correct
number of significant
figures.
Calculator answer
significant figure answer
a) 17.8 ¸ 2,800 = ______________ ___________________
b) 5500 ´ 0.1220 = ______________ ___________________
c) 3.2 ´10 5 ´ 4.78 ´ 10-12 = ______________ ___________________
8. The
amount of space an object takes up is known as its
a)
mass b) volume c) weight d) density
9. What
device is used for measuring volume?
a)
stereo b) balance c) graduated cylinder d) spring scale
10. Convert
17.2 meters to millimeters
11.
Convert 2,200 ml to gallons. (1 gallon = 3.78 liters)
12. Is
data obtained from a balance is A)
qualitative or b) quantitative?
13. If you
don't calibrate your measuring device, your data may not be very
a)
precise b) accurate c) quantitative
14. Mr.
Samson weighs about 170 pounds. This
measurement is
a) accurate but not precise b) precise but not accurate
c) both accurate and precise d) neither accurate nor
precise
15. If the ruler shown below measured in cm,
what is the length of the rectangle? __________
Use the graph below and the description of the
investigation to answer questions 16 -
27
An investigation was performed in order to see how changing the temperature affects the ability of Oxygen to dissolve into water. The person conducting the investigation expected to find that higher temperatures would allow more Oxygen to dissolve since that is what is true for solids like sugar and salt. Eight different water samples were used each at a different temperature. Each sample contained 100 ml of water through which pure Oxygen was bubbled for 5 minutes. Temperature was measured in oC , and Oxygen was measured in PPM (parts per million). The graph above shows the results of the investigation.
16. What was the Manipulated variable in this experiment?
17. What was the Responding variable?
18. Identify two controlled variables:
19. What mistake was made in labeling this graph?
20. What type of relationship appears to exist between the two variables?
21. Which data point is probably an outlier?
22. What affect would removing the outlier have on the RMSE of the equation?
23. What is the specific equation for this data set?
24. Use the equation for this data set to predict the amount of oxygen that can be dissolved at a
temperature of 8 oC:
25. Use the equation for this data set to predict the temperature at which the value for dissolved
oxygen would have a value of 2:
26. What was the investigator’s hypothesis:
27. After looking at the data, what conclusion should the investigator have reached?
28. why do
helium balloons float upwards?
29. If a
sample of mercury that fills a space of 11 ml has a mass of
143 g
what is its density?
30. If the
density of glass is 2.21 g/ml, how much volume would 665 g occupy?
31. The
density of gold is 19.3 g/ml. A pure
gold wedding ring is dropped into a graduated
cylinder and the water level rises 2.4
ml. What is the mass of the ring?
32. Methanol
has a density of 0.78 g/ml and lithium
has a density of 0.53 g/ml. Would
lithium
float
or sink in a beaker of methanol?
Go to the lab bench to answer questions 37 -39
33. What is
the mass of the brass keys?
34. What is
volume of the brass keys?
35. What is
the density of the brass keys?