Measurements

What is the purpose of using scientific tools to measure?

• To make measurements more complicated
• To ensure accurate and precise measurements
• To confuse scientists
• To make measurements inaccurate

How does measurement uncertainty affect experimental results?

• It has no effect on experimental results
• It makes experimental results less accurate
• It makes experimental results more accurate
• It makes experimental results consistent

What is the definition of range?

• The difference between the highest and lowest values in a set of data
• The average of a set of data
• The most frequently occurring value in a set of data
• The middle value in a set of data

How do you calculate the range of a set of data?

• Find the most frequently occurring value
• Add all the values and divide by the number of values
• Find the middle value
• Find the difference between the highest and lowest values

What are some common sources of measurement uncertainty?

• Instrument error, human error, environmental factors
• Measurement uncertainty does not exist
• Perfect measurements, accurate tools, controlled environment
• No causes, measurements are always precise

How do you calculate the mean of a set of data?

• Find the difference between the highest and lowest values
• Find the most frequently occurring value
• Find the middle value
• Add all the values and divide by the number of values

What is the definition of median?

• The average of a set of data
• The middle value in a set of data
• The most frequently occurring value in a set of data
• The difference between the highest and lowest values in a set of data

How do you calculate the mode of a set of data?

• Add all the values and divide by the number of values
• Find the most frequently occurring value
• Find the middle value
• Find the difference between the highest and lowest values

What is the purpose of applying significant digits and rounding in measurements?

• To ensure accurate and precise measurements
• To make measurements consistent and comparable
• To confuse scientists
• To make measurements more complicated

What are some examples of international units?

• Inches, pounds, gallons
• Meters, kilograms, liters
• Feet, ounces, cups
• Yards, tons, pints