sentence: Carbon is found in charcoal or graphite.
sentences_before: Another extra chemical that is sometimes added to rocket candy is carbon.
sentences_after: It is sometimes used as a fuel. It is used more often as an extra chemical. It makes the rocket leave a smoke trail in the sky. When the fuel burns, it makes heat. The heat usually goes to the case of the motor.
concept_name: carbon
headings: Rocket candy Components Extra chemicals
categories: Fuel Rockets