Question

serves as a comparison for evaluating the effect of the treatment.
a. experimental group
b. observation
c. control group
d. treatment group

1. facts, figures, and other evidence gathered through observations.

a. data
b. hardware
c. people
d. methods

1. a biological community of interacting organisms and their physical environment.

a. habitat
b. ecosystem
c. population
d. species

1. form of heat transfer where heat energy is directly transferred between molecules through molecular collisions or direct contact.

a. convection
b. subduction
c. absorption
d. conduction

Explanation:

Question 1 (First question about comparison for treatment effect)

To evaluate the effect of a treatment, the control group (which does not receive the treatment) is used as a comparison to the experimental group (which receives the treatment). The control group helps isolate the effect of the treatment by providing a baseline.

Data refers to facts, figures, and other evidence gathered through observations. Hardware is physical equipment, people are individuals, and methods are procedures, so data is the correct term for gathered evidence.

An ecosystem is defined as a biological community of interacting organisms and their physical environment. A habitat is the place an organism lives, a population is a group of the same species, and a species is a group of similar organisms. So ecosystem matches the description.

Answer:

c. Control Group

Question 4 (Facts, figures, evidence gathered)