Unit 2 Test Review (Scientific Data Handling)

Front

What are significant digits?

Back

Significant digits (or significant figures) are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How do you determine the number of significant digits in a number?

Back

To determine the number of significant digits, count all non-zero digits, any zeros between them, and any trailing zeros in the decimal part. Leading zeros are not counted.

Front

Convert 0.00456 to scientific notation.

Back

4.56 x 10^-3

Front

What is the scientific notation for the number 123456?

Back

1.23456 x 10^5

Front

How do you round a number using significant digits?

Back

When rounding, look at the digit immediately after the last significant digit. If it's 5 or greater, round up; if it's less than 5, keep the last significant digit the same.

Front

Calculate 3.6 × 2.5 and round using significant digit rules.

Back

9.0

Front

What is the result of 15.5 - 4.789 rounded using significant digit rules?

Back

10.7

Front

How do you convert inches to centimeters?

Back

To convert inches to centimeters, multiply the number of inches by 2.54.

Front

Convert 12 inches to centimeters.

Back

30.48 cm

Front

What is the rule for adding and subtracting significant figures?

Back

When adding or subtracting, the result should be rounded to the least number of decimal places of any number in the operation.