Semester 1 Review - Part 1

Front

What precaution should be taken when transferring hydrochloric acid to a new bottle?

Back

Clearly label the new bottle with its contents.

Front

What is the independent variable in an experiment where seeds are soaked in different concentrations of salt?

Back

Different concentrations of salt.

Front

What is the most effective approach for observing changes in the night sky over a period?

Back

Focus on a specific constellation and track its movement each night.

Front

How should a hypothesis about ice cubes melting faster in a microwave be tested?

Back

Observe and record the time for each ice cube to completely change to liquid.

Front

What is the dependent variable in an experiment testing the effect of light on plant growth?

Back

Growth of the plant.

Front

What is the definition of an independent variable in an experiment?

Back

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

Front

What is a dependent variable in scientific experiments?

Back

The variable that is measured and affected in the experiment.

Front

Why is it important to label containers in a laboratory?

Back

To prevent accidents and ensure safety by clearly identifying contents.

Front

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

Back

To provide a baseline for comparison against the experimental group.

Front

What does it mean to observe in a scientific context?

Back

To watch and record data about an experiment or phenomenon.