How is the oxygen gas and carbon dioxide exchanged for photosynthesis and cellular respiration in plants?

Which of these resources is used worldwide to make construction products, pottery, and porcelain

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

The pronunciation aid that determines the stress placed upon a syllable is the