If the bubbles produced can relight a glowing splint or support combustion, it would provide indirect evidence that the bubbles are oxygen (O2). This is because oxygen is required to support combustion.
If the bubbles do not relight a glowing splint, it would suggest they are not oxygen. Oxygen is a gas that supports combustion, so if the bubbles do not allow the splint to reignite, it indicates they are not oxygen.
Condensation droplets - apex :)
The opposite of empirical evidence would be anecdotal evidence or subjective opinion. Empirical evidence is based on objective observation and experimentation, while anecdotal evidence relies on personal accounts and experiences that may not be systematically proven.
This would be an opinion, because it is merely a statement expressed based on observation by a bystander, not actual evidence that to verify if this statement is true or not.
An increase in bubbles on the plant when it is moved under a brighter light
Water. Another idea: Water is not really "evidence" of life, but an oxygen rich atmosphere would be.
The activity that would supply the most oxygen to the body for digestion and respiration is aerobic exercise, such as running, swimming, or cycling. These activities increase your heart rate and help to improve oxygen circulation, which is beneficial for digestion and respiration.
Most would wear a cycling Jersey together with cycling shorts.
Direct observation means looking at it with your own two eyes, feeling it with your fingers (or other body parts), directly hearing it with your ears or directly tasting it with your tongue. Indirect observation means not sensing the object of observation directly but by observing the effects it has on its surroundings. An example of indirect observation might be seeing footprints in the snow and using this as evidence that snow leopards are in the area. Direct observation would be seeing the leopard itself.
Tour de France would be a major cycling event
I was cycling to the shops, when I saw Anna. *** I went cycling because I haven't been getting enough excercise.