Measurements - Accuracy and Precision Quiz

The process of comparing a quantity to a standard unit.

Measurement based on numbers or values obtained using tools.

Measurements based on descriptions or observations.

A system of measurement based on the meter as the standard unit.

Instruments used to determine properties or traits.

A standard quantity used for comparison in measurement.

How close a measurement is to the true value.

How consistent repeated measurements are.

The difference between a measured value and the true value, caused by limitations of tools and observers.

Graduated cylinders are more precise than beakers because they have finer graduations, allowing for more accurate measurements.

Data is considered valid and credible when it is both accurate and precise, meaning it is close to the true value and consistent.

In the metric system, distance is measured in meters (m), centimeters (cm), millimeters (mm), and kilometers (km).

In the metric system, volume is measured in liters (L) and milliliters (mL).

In the metric system, mass is measured in kilograms (kg), grams (g), and milligrams (mg).

The metric system simplifies measurements because all units use the same scale across different quantities (like distance, volume, and mass).

The meniscus is the curved surface at the top of a liquid in a container.

Always measure from the bottom of the meniscus to get an accurate reading of the liquid's volume.

When using a tool to measure, measure to the nearest marking and then estimate one decimal place past what you can clearly see.

Examples of measuring tools include rulers, graduated cylinders, and scales.

A temporary slide preparation where a specimen is placed in a drop of water and covered with a coverslip.

Place the coverslip at a 45-degree angle to minimize air bubbles and evenly distribute the specimen.

The unit used to measure tiny objects under a microscope. One millimeter is equal to 1000 micrometers.

To convert millimeters (mm) to micrometers (µm), move the decimal point three places to the right.

The diameter of the circle of light visible when looking through the microscope.

Place a clear ruler under the low or medium power objective lens of the microscope to measure the FOV diameter.

Measuring the size of tiny objects using units like micrometers and millimeters.

A microscope that uses multiple lenses to magnify and illuminate specimens for viewing.

The ability of a microscope to distinguish two closely spaced points as separate images. It determines the sharpness and detail of an image.

The visible area you see when looking through a microscope's ocular lens. It decreases as magnification increases.

The image appears upside down and reversed due to the mirrors in the body tube. Moving the slide right makes the image move left, and vice versa.

Always carry the microscope with two hands, clean lenses with lens paper, remove slides before storing, start with low power, keep it away from the edge of the desk, return to low power before putting away, and only use fine adjustment with high power.

Start with scanning lens, center and focus the specimen using coarse adjustment. Switch to low power, focusing with coarse then fine adjustment. Switch to high power and use ONLY fine adjustment.

A part of the microscope that controls the amount of light passing through the specimen, adjusting brightness and contrast.

A knob used for focusing the image roughly, primarily used with low power objectives.

The lens you look through on a microscope. It typically magnifies 10x.

Lenses on a microscope that provide different levels of magnification. Common magnifications are 4x, 10x, and 40x.

The combined magnification power of the ocular lens and the objective lens. Calculated by multiplying their individual magnifications.

A temporary slide preparation where a specimen is placed in a drop of water and covered with a coverslip.

The platform on a microscope where the specimen is placed for viewing.

The large knob on a microscope used for focusing the specimen with low power objective lenses.

The small knob on a microscope used for precise focusing with all objective lenses.

A type of graph that uses a line to connect points representing data over time or other continuous intervals.

Independent variable is what you change or manipulate, while the dependent variable is what you measure as a result.

Identifying patterns, changes, and relationships within a graph's data.

X-axis: Horizontal axis, usually represents independent variable. Y-axis: Vertical axis, usually represents dependent variable.

A graph that uses bars of different heights to compare data points across different categories.

When two variables increase or decrease together.

When one variable increases, the other decreases.

A line drawn on a graph to show the general trend of the data points.

The independent variable is the factor that is changed or controlled by the experimenter.

The dependent variable is the factor that is measured or observed in an experiment.

The difference between the highest and lowest values in a set of data.

Patterns or relationships observed in the data displayed on a graph.

Pie charts are used to compare parts of a whole, often represented as percentages.

Scatterplots show the relationship between two sets of data points, revealing possible trends or correlations.

A positive direct relationship indicates that as one variable increases, the other variable also increases.

A scatter plot is used to show the relationship between two sets of data points.

A pie chart displays parts of a whole, often represented as percentages.

A bar graph is the best for comparing salaries of different professions, as it allows for easy visual comparison of different categories.

A visual way to organize information, usually numerical, in a clear and easy-to-understand format.

A descriptive title that clearly states what is being measured and the variables involved. It typically follows the format: "The Effect of ______ on ______."

Clearly label each column with the variable being measured and its units (for quantitative data).

Organize the data collected for each trial in vertical columns. The variables measured are presented by trial.

All measurements should be recorded to the same level of precision (number of decimal places). Averages should have the same precision as the raw data.