BChem 1st Semester Practice Final

Front

What is the correct order of the scientific method steps?

Back

Ask a question, research, state your hypothesis, experiment, analyze, make a conclusion.

Front

How many protons does Lead-209 (Pb-209) have?

Back

82 protons.

Front

Who developed the atomic theory?

Back

John Dalton.

Front

What is the formula to calculate density?

Back

Density = Mass / Volume.

Front

If a block of aluminum has a mass of 40.5 g and occupies a volume of 15 cm³, what is its density?

Back

2.7 g/mL.

Front

How many significant figures are in the number 0.00204?

Back

3 significant figures.

Front

What is a hypothesis in scientific research?

Back

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

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 the purpose of a control group in an experiment?

Back

A control group is used as a standard for comparison to determine the effect of the independent variable.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement.