Chem 1 Semester 1 Review

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or observed in an experiment, which changes in response to the independent variable.

Front

What does the atomic number of an element represent?

Back

The atomic number represents the number of protons in the nucleus of an atom of that element.

Front

What is accuracy in measurements?

Back

Accuracy refers to how close a measured value is to the true value.

Front

What state of matter has no fixed volume or shape?

Back

Gas has no fixed volume or shape and fills its container uniformly.

Front

What does a bullseye diagram indicate about accuracy and precision?

Back

A bullseye diagram can show the relationship between accuracy and precision, such as low accuracy and high precision when measurements are clustered together but far from the true value.

Front

Define independent variable in an experiment.

Back

The independent variable is the factor that is manipulated or changed in an experiment to observe its effect on the dependent variable.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.