What do geologist use to determine a rock's layers absolute age

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Where are the strongest jet streams located?

As an asteroid comes close to earth, it's name will change to? apex