Is There Less Oxygen in the Winter Since It's Colder?

The video explains the importance of trees and phytoplankton in producing oxygen through photosynthesis. It discusses how oxygen levels vary seasonally, especially in the Northern Hemisphere, and how scientists measure these changes. Despite seasonal variations, there is always enough oxygen in the atmosphere, thanks to both land plants and marine phytoplankton.

What is the primary function of oxygen in our cells?

• To transport nutrients

• To regulate body temperature

• To convert food into usable energy

• To provide structural support

Which organism is a significant contributor to the oxygen in our atmosphere?

• Marine cyanobacteria called Prochlorococcus

• Land-based mammals

• Deep-sea fish

• Desert cacti

How does warmer water affect the release of oxygen into the atmosphere?

• It allows oxygen to escape more easily

• It prevents oxygen from escaping

• It holds more dissolved gas molecules

• It has no effect on oxygen release

What did scientists discover about oxygen levels in the Northern Hemisphere during winter?

• Oxygen levels increase significantly

• Oxygen levels remain constant

• Oxygen levels decrease slightly

• Oxygen levels drop drastically

Why is there less seasonal variation in oxygen levels in the Southern Hemisphere?

• The Southern Hemisphere experiences less sunlight

• More land masses are located there

• Fewer land plants release oxygen directly into the air

• The Southern Hemisphere has more phytoplankton