Grade 10 GED Science half year Test

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 the provided plant experiment, the independent variable is the type of liquid given to the plants.

Front

What gas do plants take in during photosynthesis?

Back

Plants take in Carbon Dioxide (CO2) during photosynthesis, which is essential for the process of converting light energy into chemical energy.

Front

What is distillation used for?

Back

Distillation is a separation process that separates components of a mixture based on differences in their boiling points.

Front

What is the boiling point of ethanoic acid at 80 kPa?

Back

The boiling point of ethanoic acid at 80 kPa is 111°C.

Front

What is the function of the cell membrane?

Back

The cell membrane controls what enters and exits the cell, providing a barrier and maintaining the cell's environment.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is an independent variable?

Back

An independent variable is a variable that is manipulated or changed in an experiment to observe its effect on the dependent variable.

Front

What is a dependent variable?

Back

A dependent variable is the variable that is measured or tested in an experiment, which is affected by changes in the independent variable.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is the green pigment found in plants that absorbs light energy, primarily from the sun, to facilitate the process of photosynthesis.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.