Why is regular exercise important for the body? muscular system?

Identify the missing parts of the carbon cycle

What is the difference between an igneous, sedimentary and metamorphic rock

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen