LS Semester 1 Benchmark Review

Front

What is the independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable. In Elin's investigation, the independent variable is the amount of fertilizer.

Front

What is the purpose of a triple beam balance?

Back

A triple beam balance is used to measure the mass of an object accurately. It consists of a beam with three sliding weights that can be adjusted to balance the object being measured.

Front

Where is there a low concentration of dye in a solution?

Back

There is a low concentration of dye at the bottom of the cup, where the dye has not yet spread out evenly.

Front

What shape describes a DNA molecule?

Back

A DNA molecule is best described as a double helix, which looks like a twisted ladder.

Front

What structures are found in plant cells but not in animal cells?

Back

Plant cells have a cell wall and chloroplasts, which are not found in animal cells.

Front

What is a dependent variable in an experiment?

Back

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

Front

What is the function of chloroplasts in plant cells?

Back

Chloroplasts are responsible for photosynthesis, the process by which plants convert sunlight into energy.

Front

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

Back

A control group is used as a standard for comparison in an experiment. It does not receive the experimental treatment, allowing researchers to see the effects of the independent variable.

Front

What is the role of the cell membrane?

Back

The cell membrane controls what enters and exits the cell, providing protection and support.

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.