The most unusual thing about the way water changes from one state to another is that its liquid state is denser than its solid state, so increased pressure actually encourages ice to melt. This is unlike most substances, in which increased pressure encourages solidification because the solid state is the most dense.
What procedure is being performed?
Sit-ups are the muscle strengthening activity. Running and jumping are both cardio, and stretching just warms up the muscles.
Answer:
Taking in oxygen & expelling carbon dioxide and working with the circulatory system.
Explanation:
The lungs work with the circulatory system to pump blood cells with oxygen to all cells in the body, the blood then collects waste and carbon dioxide and brings them back to the lungs where they're taken out of the body when we exhale.
