Answer:
at least 150 minutes (2 hours and 30 minutes) a week of moderate-intensity, or 75 minutes (1 hour and 15 minutes)
Explanation:
For substantial health benefits, adults should do at least 150 minutes (2 hours and 30 minutes) a week of moderate-intensity, or 75 minutes (1 hour and 15 minutes) a week of vigorous-intensity aerobic physical activity, or an equivalent combination of moderate- and vigorous-intensity aerobic activity.
Answer:
Highway hypnosis is similar to drowsy driving or falling asleep behind the wheel. The parts of the brain are not communicating with one another as quickly or as frequently as someone who is fully awake or conscious. This reduces driver reaction time and can increase the risk of collisions.
CFC molecules are broken down in the
stratosphere by ultraviolet light to give highly reactive chlorine atoms. Then chlorine atoms react with ozone molecules. Last chlorine atoms are regenerated by this chain reaction so can react with
more ozone molecules.
