First Semester Review

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the factor that is measured in an experiment. It changes in response to the independent variable.

Front

What is the correct method to smell substances in a laboratory?

Back

Wafting is the correct method to smell substances in a lab. This involves gently waving your hand over the substance to direct the smell towards your nose.

Front

How do you determine the number of different elements in a chemical formula?

Back

Count the unique symbols in the chemical formula. Each symbol represents a different element.

Front

What is the unit of measurement for mass?

Back

The unit for mass is grams (g).

Front

What can be calculated from a given picture of an object?

Back

You can calculate the volume of the object if the dimensions are provided.

Front

What is an independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What is the scientific method?

Back

The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

Front

What is the formula for density?

Back

Density is calculated using the formula: Density = Mass/Volume.

Front

What is the difference between mass and weight?

Back

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

Front

What is a hypothesis?

Back

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