Speaking of habitable, the atmosphere also contains the oxygen we need to breathe to support cellular respiration, the metabolic process that provides the chemical energy necessary for life. How much oxygen is in the air? This project will show you an interesting way to measure the percentage of oxygen in a sample of air in a test tube. The method depends on atmospheric pressure and a chemical reaction that removes oxygen from the air. So, what kind of chemical reaction can remove oxygen from the air? Oxidation of iron, also known as rusting, will do the trick. Exposed iron will rust in the presence of oxygen and water.
The Plott Hound is a medium size breed of dog. They are usually 20-25 inches tall (51-61 cm). Plott Hounds weigh about 45-55 pounds (20-25 kg). They are well-muscled and strong. The Plotts have double coats which are smooth and glossy. They can be any shade of brown, black, or tan. The coat has a striped pattern.
CHASE- Breed: German Shepherd. Specialty: Police Pup. Personality: Using his police truck and megaphone, this German Shepherd is an athletic natural leader who likes to take charge and is the leader and captain of the PAW Patrol. As the team's police pup, Chase uses sense of smell for tracking and/or investigating.