Chemistry Regents Exam Review HW 2 (Significant Digits)

What material is used to define the standard kilogram?

• Platinum and Iridium

• Aluminum and Nickel

• Gold and Silver

• Copper and Zinc

How many base units are included in the International System of Units?

• Five

• Seven

• Ten

• Twelve

What was the consequence of using incorrect units for the Mars Climate Orbiter?

• Successful mission

• Increased costs

• Orbiter crashed into Mars

• Delayed mission

What does scientific notation help to preserve in calculations?

• Significant figures

• Decimal places

• Arbitrary values

• Whole numbers

What is the primary reason for using significant figures in measurements?

• To simplify calculations

• To indicate measurement accuracy

• To reduce data size

• To increase precision