Angela wants to conduct an experiment to test how different types of music impact the growth of planets what should Angela use as a constant variables in the experiment

Some possible constant variables Angela could use in her experiment include:

1. Type of plant: Angela should use the same type of plant for each group in the experiment to ensure consistent results.

2. Size of plant pot: Angela should use the same size and type of pot for each plant to ensure equal growing conditions.

3. Amount of water: Angela should water each plant the same amount and at the same frequency to provide consistent growing conditions.

4. Amount of sunlight: Angela should ensure that each plant receives the same amount of sunlight each day to maintain consistent growing conditions.

5. Soil type and quality: Angela should use the same type and quality of soil for each plant to provide consistent nutrients for growth.

By controlling these constant variables, Angela can ensure that the only variable being tested in her experiment is the type of music and its impact on plant growth.