Answer:
1. stay away from the people and control the habits
Answer: Yes
Air serves as a propagation medium.
Explanation:
Propagation of sound wave require a medium for transmission. Sound is produced by vibrating objects, The matter or substance through which sound is transmitted is called a medium. It can be solid, liquid or gas. Therefore to propagate sounds (human voice) from one end of a lecture hall to the other we need a propagation medium which is air. Air serves as a propagation medium.
Answer:
I'm pretty sure the answer is D
Explanation:
Honestly it's just a guess so let me know if it's right :3
Answer:
astronomical unit
Explanation:
https://en.wikipedia.org/wiki/Astronomical_unit
You may confuse two minerals by their colors so using streak is another way for showing their "true colors "