Name two ways carbon (usually in the form of co2) enters the atmosphere.

1. When you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere.

2. Animals and plants get rid of carbon dioxide gas through respiration.

3. Carbon moves from fossil fuels to the atmosphere when fuels are burned.

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.