In a laboratory class, Vic and Ricky were given a set of measuring tools to measure the boiling point of seawater. After 1^st trial, they found out that their results are of closer value. However, it is far from the true value. How can they reduce the error in the experiment?

• By repeating the measurement numerous times and averaging the result.

•  Calibrating instruments correctly.

• Always taking measurements under standard conditions.

• Perfecting experimental technique.

In a zoology class, Pedro measured the length of an earthworm using a ruler for three times as part of the data gathering procedure of his experiment. What type of measurement error might he commit?

• calibration error

• systematic error

• random error

• human error

How will you assess a group of measurements for which there is insignificant random error and significant systematic error?

• it is imprecise and biased

• it is precise and biased

• it is imprecise and unbiased

• it is precise and biased

Which of the following numbers contain the designated CORRECT number of significant figures?

• 0.00302 - 2 significant figures

• 0.04300 - 5 significant figures

• 1.04 - 2 significant figures

• 156 000 - 3 significant figures

How many yards is 9 mi? (1 mi = 1760 yards)

• 12 672 yards

• 14 500 yards

• 15 840 yards

• 16 040 yards

What does the position-time graph shown on the right tells us about the motion of an object?

• The object is accelerating in the positive direction

• The object is moving in the positive direction at a constant velocity

• The object is in uniform motion and headed in the negative direction

Which of the following is not a unit of constant velocity?

• m/s

• mi/h

• km/h

• m/s/s

How are you going to express 27,000 in scientific notation?

• 27 x 10^-4

• 2.7 x 10^3

• 2.7 x 10^-4

• 2.7 x 10^4

Which of the following statements is NOT TRUE?

• Non-zero digits are always significant.

•    Zeroes between two significant digits are not significant.

• Trailing zeroes in the decimal portion only are significant.

• All zeroes in a quantity are always significant.

Vectors multiplied or divided by scalars will have what quantity as a result?

• Vectors if multiplied and scalars if divided

• scalars

• vectors

• scalars if multiplied by scalars