QUIZ 1.1 MEASUREMENTS, ERROR AND VARIANCE
Quiz by Aurora Ramos
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- Q1
Stephen bought a new weighing scale. It shows that he is 1 kg less than his actual mass. Describe the accuracy and precision of the weighing scale.
Accurate, but not precise
Precise, but not accurate
Both accurate and precise
Neither accurate nor precise
30sSTEM_GP12EU-Ia2 - Q2
Which shows the closeness of a value to the real value?
True Value
Uncertainty
Precision
Accuracy
30s - Q3
A brand of soda claims that a bottle contains 500 ml. After measuring three bottles the volume using graduated cylinder, the masses were 497 ml, 503 ml, and 501 ml.
Precise, but not accurate
Both accurate and precise
Neither accurate nor precise
Accurate, but not precise
30s - Q4
Which of the following is used to adjust an instrument so its measurement can be close to the real value?
Accuracy
Precision
Calibration
Uncertainty
30s - Q5
Which of the following is the most accurate instrument in measuring mass?
Graduated cylinder
Triple beam balance
Ruler
Meterstick
30s - Q6
According to an internet site, the average Filipino is 163 cm in height. Which of the following is equal of this value in the English system?
5 ft. 4.17 in.
4 ft. 2.15 in.
5 ft. 3.5 in.
5 ft. 3.20 in
30s - Q7
A baby was born 6.6 pounds. How many kilograms is the baby’s mass?
3.0
4.0
5.0
8.0
30s - Q8
Reynaldo has a banana plantation that has a length of 4 x10^2 meters and width of 8 x10^2 meters. What is the area of his plantation?
3. 2 x104 m2
3. 2 x102 m2
3. 2 x105 m2
3. 2 x103m2
30s - Q9
What are the values being compared in percentage difference?
True value and mean value
Mean value and experimental value
True value and experimental value
Absolute value and mean value
30s - Q10
A cube of iron measures 2.00 cm on each edge and has a mass of 62.9 g. Calculate its density in kg/m3
Users enter free textType an Answer60sSTEM_GP12EU-Ia1 - Q11
Calculate the uncertainty of the data below using variance and standard deviation.
A physics student measured the distance traveled by a cart moving horizontally in 30 seconds. Using the same stopwatch for each trial, he got the following data:
1.2 m 0.9 m 1.0 m 0.8 m 1.3 m
1.0
120sSTEM_GP12EU-Ia5