The structure through which gases are exchanged between the atmosphere and the blood is the:

Question 20 options:

diaphragm

alveolus

thymus

esophagus

trachea

How can you keep track of variables in a science experiment?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return