Scientists believe that three to four severe ice ages, which froze nearly or all of the surface, occurred between 750 million and 580 million years ago, probably because Earth's land masses were all located at or near the equator, which resulted in increased weathering.
Weathering is when wind and precipitation break down rocks and minerals on the planet's surface. The process leads to decreased carbon dioxide levels in the atmosphere, which allows more heat to dissipate from the surface and into space, cooling the planet.
Once the world iced over, carbon dioxide brought up by volcanoes could no longer be removed from the atmosphere: there were no rivers, no rain or snow and no weathering. For millions of years, carbon dioxide levels climbed, eventually rising to about 300 times what they are today.
Based on the information provided within the question it can be said that in this scenario the trainer should recognize the vastus lateralis as needing static stretching. This is because this muscle's only task is to extend the lower leg and thus allowing the body to lift itself up from a squatting position. Which is exactly what the client is currently doing in this scenario.
Measuring photosynthesis via the production of oxygen. Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time.
