Accuracy refers to how close a measurement is to:

Waseem is collecting data on the volume of gas produced in a reaction. He uses a gas syringe. What is a potential source of error in using a gas syringe?

Measurements can be precise but not accurate when they are:

Quinn is measuring the volume of a liquid using a graduated cylinder. He reads the meniscus incorrectly each time. What type of error is this?

Patricia is collecting data on the boiling points of different liquids. She uses a thermometer that is not calibrated correctly. What type of error is this?

David is measuring the volume of a liquid. He reads the volume at eye level to avoid parallax error. What is parallax error?

Ahmed is collecting data on the pH of different solutions. He uses a pH meter to measure the pH. What type of data is pH measurement?

Yusuf is analyzing data from an experiment and calculates the standard deviation. What does the standard deviation measure?

Which improves precision?

Which term describes correctness of result?

Which best reduces experimental error?

Rachel is analyzing data from an experiment. She finds that the median and mean are different. What does this indicate about the data distribution?

Quantitative data is data that:

Tina is analyzing data from an experiment and calculates the standard deviation. A small standard deviation indicates that the data points are:

Uma is conducting an experiment to find the empirical formula of a compound. She collects data on the masses of elements. What is empirical formula based on?

Which variable is deliberately changed in an experiment?

A valid conclusion must be:

Which graph is best for showing change over time?

Emma is conducting an experiment to determine the density of a metal. She measures the mass and volume. What is the formula for density?

Patricia is collecting data on the mass of a precipitate. She uses a filter paper to collect the precipitate. What is a potential source of error in this measurement?

Khalid is analyzing data and finds that the mean is 5.2 and the median is 5.0. What does this suggest about the data?

A trend in data refers to:

Repeated trials in an experiment help to:

Uma is conducting an experiment to determine the concentration of an acid. She performs a titration. What is the role of the indicator in a titration?

The horizontal axis of a graph usually represents:

Which instrument measures volume of liquids?

Waseem is collecting data on the melting points of different substances. He wants to compare the melting points. Which type of graph is most appropriate?

Xia is analyzing data from an experiment and finds a correlation between two variables. What does a correlation indicate?

Nora is analyzing data from a reaction. She calculates the rate of reaction from the slope of a concentration vs. time graph. What does a steeper slope indicate?

Sam is conducting an experiment and finds that the data is very precise but not accurate. What does this mean?