You observed several chemical reactions throughout the lessons in this unit. And we discussed them in class.

A. List 5 signs (observations) that indicate a chemical reaction has occurred.

B. Give 1 specific example for 2 of the signs you listed.

Which statements are true of a scientific theory but not a hypothesis

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.

Why are some people more concerned about shark survival than about shark attacks?