Scientific Method
The first step of the scientific method.
Form a testable question.
This SI unit measures electric current.
What is Ampere
This type of data is based on numbers and always includes a number and a unit.
What is Quantitative data?
Data that use numbers are called this.
Quantitative data.
What is the difference between accuracy and precision in data collection?
Accuracy is how close a measurement is to the true value; precision is how close repeated measurements are to each other.
This step comes after background research.
Forming a hypothesis.
This SI unit measures amount of substance.
What is mole?
Scientists can never achieve this type of measurement, because all measurements contain uncertainty.
what is Measurement Uncertainty?
Data that describe physical traits are called this.
Qualitative data.
Why do scientists include a control group in experiments?
To provide a baseline for comparison so only the independent variable is affecting the results.
The difference between an independent and dependent variable.
Independent is changed, dependent is measured.
This SI unit measures luminosity or light intensity.
What is Candela?
This is a description of a consistent relationship in nature.
Scientific law.
When scientists falsify data, this group—relying on research for medical decisions—can be harmed.
Who are Doctors, or medical Community?
What is the main reason scientists repeat measurements in the same experiment?
To increase reliability and reduce random errors (repetition).
Why controlled variables are important in experiments.
They ensure a fair test by keeping conditions the same.
This prefix means one billion
What is Giga-?
The key difference between a theory and a law.
Law describes what happens; theory explains why.
This term refers to a ratio that allows scientists to convert between units, such as inches and feet.
What is Conversion Factor?
What is the main reason scientists want other groups to perform the same experiment?
To confirm results through replication and make findings more trustworthy.
Design an experiment to test how light affects plant growth
Variable: Amount of light. Independent Variable: Plant growth (height). Control: Same type of soil, water, and plant species.
This prefix means one millionth
What is Micro-
Give one example of a model and explain how it helps scientists.
Example: A solar system model; helps visualize orbits and positions.
Why repetition and replication make data more reliable.
They reduce errors and confirm results across different trials and researchers.
A student measures the volume of a liquid three times and gets 50 mL, 51 mL, and 49 mL. The actual volume is 75 mL. Is the data accurate, precise, both, or neither? Explain.
The data is precise (measurements are close together) but not accurate (they are far from the true value).