Bio Review #2 - Scientific Method/Chem/Water/pH

Front

What is the first step in the scientific method?

Back

Observation is the first step in the scientific method, where a researcher notices something and asks questions about it.

Front

What is an independent variable in an experiment?

Back

An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

Which substance is considered to have high acidity?

Back

Lemon juice is considered to have high acidity, with a low pH value.

Front

How many electrons are involved in a single covalent bond?

Back

Two electrons are involved in a single covalent bond.

Front

What is quantitative data?

Back

Quantitative data is information that can be measured and expressed numerically, such as weight, height, or temperature.

Front

What is qualitative data?

Back

Qualitative data describes characteristics or qualities that cannot be measured numerically, such as color, smell, or texture.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

Front

What is the purpose of a control group in an experiment?

Back

The control group serves as a standard for comparison, allowing researchers to see the effects of the independent variable.

Front

What is the difference between an observation and an inference?

Back

An observation is a direct statement based on what is seen or measured, while an inference is a conclusion drawn from observations.