Question

1. what are controlled variables in an experiment?

a. the factors that are changed during the experiment
b. the data collected from the experiment
c. the outcomes that are measured
d. the factors that are kept constant to ensure accuracy

1. what type of data includes measurements like length and volume?

a. qualitative data
b. quantitative data
c. inferred data
d. subjective data

1. which sensory tool is not typically used for making observations?

a. guessing
b. sight
c. hearing
d. touch

Explanation:

Question 13

Controlled variables in an experiment are factors kept constant to ensure the experiment's accuracy (to isolate the effect of the independent variable). Option a is independent variable, b is data, c is dependent variable.

Quantitative data involves numerical measurements (like length, volume). Qualitative is descriptive, inferred is deduced, subjective is opinion - based.

Guessing is not a sensory tool; sight, hearing, touch are sensory tools used for observations.

Answer:

d. The factors that are kept constant to ensure accuracy

Question 14