Rebekah waters three plants with different amounts of salt water. a fourth plant receives regular water. the plants are placed on the same window sill for sunlight. after a two-week period, the height of the plant is measured. identify the variables in this experiment.

The independent variable would be salt water since it never changes since they all get the same amount.

The dependent variable would be the height of the plant because all of them might grow differently depending on the amount of salt in the water given.

The constant variable would be sunlight because it always get the same amount everyday.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.