Physical Science Exam 1

Front

Why is the metric system used in science worldwide?

Back

It is based on powers of ten for easy conversions.

Front

What aspect of the scientific method is demonstrated by designing controlled experiments?

Back

It ensures that only one variable is changed at a time to test its effect.

Front

What is a hypothesis in the scientific method?

Back

A testable prediction about the relationship between variables.

Front

How is scientific notation represented?

Back

It expresses numbers as a product of a number between 1 and 10 and a power of ten.

Front

What makes a hypothesis valid?

Back

It is testable through experiment.

Front

What is the purpose of a controlled experiment?

Back

To isolate the effect of the independent variable on the dependent variable.

Front

What is the significance of significant figures in measurements?

Back

They indicate the precision of a measurement.

Front

What is the difference between a theory and a hypothesis?

Back

A theory is a well-substantiated explanation, while a hypothesis is a testable prediction.

Front

What is the role of observation in the scientific method?

Back

It helps in gathering data and forming hypotheses.

Front

What is the independent variable in an experiment?

Back

The variable that is changed or controlled to test its effects on the dependent variable.