Matching: match the trace element with the function. a. magnesium b. iron c. zinc 11. hemoglobin carry oxygen 12. part of the enzyme that maintains acid balance in your stomach 13. found in chlorophyll

Iron helps hemoglobin carry oxygen
   
Zinc part of the enzyme that maintains acid balance in your balance.

Magnesium found in chlorophyll
       
Iron is a part of the complex that binds to oxygen in hemoglobin that is essential to the function of blood.
   
Zinc is a regulator for the stomach when pH is too low.
   
Magnesium is used by plants in chlorophyll to detach oxygen and use it for photosynthesis.

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.