Question

exit ticket. practice science vocabulary: a student runs an experiment to test the effect of fertilizer on plant growth. some plants are grown in water, some are grown in water with 5% fertilizer, and some in water with 20% fertilizer. the height of each plant is measured after 2 weeks. ★ what is the independent variable? a. type of water b. height of plant c. type of plant ★ what is the dependent variable? ____ b. type of water b. height of plant c. type of plant now practice identifying which of the following are either the control group or constants in an experiment. ★ write control or constant to show your understanding __ using the same type of soil for each plant __ using the same type of pot for each plant __ giving the same amount of sunlight to each plant ____ the plant that is grown in plain water (no fertilizer added)

Explanation:

1. Independent Variable Question

The independent variable is the factor manipulated in an experiment. Here, the fertilizer concentration (or presence/absence, related to type of water with fertilizer) is changed. Option a (Type of water, considering fertilizer in water) is manipulated, while b is the dependent variable (measured) and c is not mentioned as varied.

The dependent variable is what's measured. The experiment measures plant height, so b (Height of plant) is dependent. a is independent, c is not varied.

Constants are factors kept the same. Soil type is kept constant across plants.

Answer:

a. Type of water

2. Dependent Variable Question