Stuttering occurs when the natural flow of speech is interrupted. When the child involuntarily prolongs sounds, is unable to produce certain sounds, or repeats a sound, we can say he or she is at risk for stuttering. Stuttering will usually begin between the ages of three and six.
It is significant that so much carbon dioxide stays in the atmosphere because CO 2 is the most important gas for controlling Earthâs temperature. Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energyâincluding infrared energy (heat) emitted by the Earthâand then re-emit it.
â¢ carbon enters the biosphere through photosynthesis and by animals eating plants or other animals. carbon enters the atmosphere through death/decay of plants & animals, forest fires, respiration, burning fossil fuels and volcanic eruptions. carbon enters the hydrosphere by dissolving into ocean water. carbon enters the geosphere through death/decay of plants & animals. How does Carbon exit each sphere?