PLEASE HELP M!! "Can dogs identify colors?" is an example of a scientific question. "Are dogs better pets than cats?" is not. Use complete sentences to explain the difference between these questions and why only one is scientific. Give me a written answer plz!

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

How do water’s relative densities as a solid and a liquid differ from that of most other substances? water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities. water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities. water’s liquid form is less dense than its solid form, while the opposite is true of most other substances. water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.

In figure 1-2 what is the distance from point b to point c?