REVIEW on Units,, Physical Quantities and Measurements

C₂H₅SH is burned in the presence of oxygen gas to form carbon dioxide and water. 0.7 grams of carbon dioxide should have been formed, but the reaction only produced 0.490 grams. What is the percent error of this reaction?

• 25 %

• 30 %

• 40 %

• 10 %

Convert 50 km to m

• 500m

• 50,000m

• 5,000m

• 500,000m

Which one of the selections represent the number 63,000.0 written in scientific notation

• 6.3 X 10⁵

• 0.63 X 10⁴

• 6.3 X 10⁴

• 0.63 X 10¹

It refers to the closeness of the measured data to the true value.

• Precision

• Accuracy

• Random Error

• Systematic Error

This bullseye demonstrates...

• High Accuracy & High Precision

• 
  Low Accuracy & High Precision

• High Accuracy & Low Precision

• 
  Low Accuracy & Low Precision

What errors occur in time measurements by a clock that runs too fast or slow?

• Systematic errors

• Both systematic and random errors

• Random errors

• Neither systematic nor random errors

It is a process of assigning a quantity to describe the property of an object by comparing it with a standard.

• measurement

• physical quantity

• 
  physics

• derived quantity

It is the standard system of measurement that is widely used today

• International System of Units (SI Units)

• English System

• Informal Measurement (Body Parts)

• Physical Quantity

is used to express very small and very large numbers

• 
  scientific notation

• None of the above

• scientific method

• 
  km

Base unit for Temperature

• Kelvin

• Candela

• Meters

• Celsius