What is the tube connecting the larynx and the lungs?

•bronchi

•trachea

•alveoli

•pharynx

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process