Question

1. in which of the following experiments would a model be most practical? sc.6. n.3.4

a. an experiment to study the amounts of rainfall in two small sections of desert
b. a comparison of growth rates in two species of lizard
c. a study of the effects of weathering on concrete
d. a study comparing reaction rates of teenage girls and boys to loud music

Explanation:

• Option A: Studying rainfall in small desert sections can be directly measured without a model.
• Option B: Comparing lizard growth rates can be observed and measured in real - time.
• Option C: Weathering of concrete occurs over long periods. A model can simulate the weathering process (e.g., using accelerated aging techniques in a lab - scale model) more practically than waiting for natural weathering over years.
• Option D: Reaction rates of teenagers to loud music can be directly tested on the subjects.

Answer:

C. a study of the effects of weathering on concrete