WorksheetsTEST - CP_Unit 1 - Science Practices
Total questions: 35
Worksheet time: 18mins
Name
Class
Date
1.
A cow is given a growth hormone and then compared to another cow that was not given a growth hormone. Both cows were weighed at 2 years.
Dependent variable:
a)
growth hormone
b)
weight
2.
Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours.
Dependent variable:
a)
presence of mosquito repellent
b)
number of bites
3.
One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day.
Independent variable:
a)
type of water
b)
mass of grape
4.
Pillbugs are placed in a container where they have a choice of a wet or a dry environment. Researchers record how much time was spent on each side
Independent variable:
a)
wet or dry environment
b)
time spent on each side
5.
A stapler is used to staple 100 papers, it jams 5 times during the trial. A different brand of stapler performs the same test; it jams 22 times.
The number of jams is the...
a)
independent variable
b)
dependent variable
6.
In a scientific experiment, a researcher wants to investigate the effect of temperature on the growth of plants.
Dependent Variable:
a)
The growth of plants
b)
The temperature
7.
In a survey, a researcher wants to determine if there is a relationship between income and happiness.
Dependent variable:
a)
The income
b)
The happiness
8.
Students investigate if heart rate if effected by the amount of exercise.
The heart rate is:
a)
independent variable
b)
dependent variable
9.
Person sets out to see if the higher the temperature of the air in the oven, the faster a cake will bake.
Dependent variable:
a)
temperature
b)
time of cake to bake
10.
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly:
The distance traveled is
a)
independent variable
b)
dependent variable
11.
Based on the image:; Which is more dense: mineral oil or paraffin wax?
a)
mineral oil
b)
paraffin wax
12.
Substance A has a mass of 12.5 grams and a volume of 20.0 mL. Calculate the density of substance A in grams/mL
a)
0.625
b)
1.6
c)
250
13.
What is the mass of an aluminum block that has a density of 2.7 g/cm^3; and volume of 10. cm^3? (grams)
a)
0.27
b)
3.70
c)
27
14.
5800 mL = ? daL
a)
580
b)
58
c)
5.8
d)
0.58
15.
.000 052 kg = ? cg
a)
.052
b)
0.52
c)
5.2
d)
52
16.
26.2 km = ? m
a)
26200
b)
26200000
c)
0.0262
d)
0.0000262
17.
561000 uL = ? cL
a)
0.561
b)
561
c)
561000000
d)
56.1
18.
6700 mL = ? L
a)
6.700
b)
0.6700
c)
670.0
19.
0.25 mm = ? m
a)
250
b)
0.025
c)
25000
d)
2.5
20.
5.50 km = ? cm
a)
5500
b)
550000
c)
0.000550
d)
0.550
21.
Student A had percent error of 13% while student B had a percent error of 4.0%. Which student was more accurate?
a)
Student A
b)
Student B
22.
How would you describe the accuracy and precision of the 3 darts?
a)
good accuracy, poor precision
b)
good precision, poor accuracy
c)
both are good
d)
both are poor
23.
Student A found the density of x in lab to be 3.15 g/mL. Substance X has a density of 3.82 g/mL. What is the students percent error?
a)
82.5%
b)
17.5%
c)
19.7%
d)
121%
24.
1.23 x 10⁴ written in standard form would be
a)
0.00123
b)
0.0000123
c)
12300
d)
1230000
25.
0.00244 in scientific notation is
a)
0.244 x 10⁻³
b)
2.44 x 10⁻³
c)
244 x 10 ⁻³
26.
Answer:
a)
0.0000000939
b)
93600000000
c)
936000000
d)
0.0000000936
27.
Which is a larger value?
a)
1.23 x 10^-5
b)
1.23 x 10^5
28.
How many significant figures?
a)
1
b)
2
c)
3
d)
4
29.
How many significant figures?
a)
2
b)
1
c)
3
d)
4
e)
5
30.
How many significant figures?
a)
1
b)
2
c)
3
d)
4
e)
5
31.
How many significant figures?
a)
1
b)
2
c)
3
d)
4
e)
5
32.
How many significant figures?
a)
1
b)
2
c)
3
d)
4
e)
5
33.
Which is the better ruler?
a)
A
b)
B
c)
C
34.
3.1 cm would be a valid measurement if it came from which ruler?
a)
A
b)
B
35.
Which is a better measurement from a more precise scale?
a)
mass of 400 grams
b)
mass of 400.000 grams
c)
both are the same
100 %
