Which is the final event that occurs when a star is forming

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Which heredity condition causes a buildup of mucus in lungs and pancreas? a. cystic fibrosis b. heart disease c. huntington's disease d. sickle cell anemia

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000