What Are Photosynthesis and Respiration?

Photosynthesis in plants and a few bacteria is responsible for feeding nearly all life on Earth. It allows energy from the sun to be converted into a storable form, usually glucose, which plants use to grow and thrive. Photosynthesis also generates the oxygen that animals need to survive. But here we animals repay the favor. We exhale the carbon dioxide that plants need for photosynthesis. Here, take a closer look at the oxygen/carbon dioxide cycle and the process of photosynthesis.

Introduction to the Carbon Cycle

Modeling the Long-Term Carbon Cycle

This tutorial introduces the carbon cycle

More precisely, this ratio is 100 to 50; these are the currentbest estimates for the total amount of carbon, in gigatons, used andreleased in photosynthesis and respiration each year on a globalbasis.

Cycle of Photosynthesis and Respiration - VTAide

And yet if we don't make some attempt to describe thisprocess in the form of a global model, our understanding of thedynamics of the global carbon cycle will languish in the earlystages.

Through respiration, plants (andanimals) release water and carbon dioxide.

This lab works great when teaching about the carbon cycle as well

These processes form a carbon cycle in which the proportion of carbon dioxide in the atmosphere remains about the same. The animation should help you to understand how the cycle works. Note that you do not need to know about decomposition and fossilisation.

Carbon Cycle Lab- Photosynthesis and Respiration

The rising human population is adding to atmospheric carbon dioxide in other ways, too. When land is cleared for timber and farms, there are fewer trees to remove carbon dioxide from the atmosphere by photosynthesis. If the fallen trees are burned or left to rot, additional carbon dioxide is released into the atmosphere. This is particularly important when forests are cleared to make way for farms. Not only are there then fewer trees to absorb carbon dioxide, but the burning of the trees releases carbon dioxide.

The light reactions convert solar energy to light energy, while the Calvin cycle makes glucose and other organic compounds from carbon dioxide.

Photosynthesis & Cellular Respiration - Biology Junction

Carbon is critical to sustain a huge range of Earth’s functions. Not only is it present in all living beings, it is a major component of a number of minerals (e.g. graphite and diamond). This means that it is abundant across the world, in: the atmosphere (air); biosphere (living and dead organism organisms); hydrosphere (oceans, rivers, and lakes); and lithosphere (soil and rocks). These act as storage areas of ‘reservoirs’ of carbon, either in the short-term (a few minutes) or long-term (millions of years). As the Earth is such a dynamic environment, processes such as erosion, evaporation, photosynthesis, respiration, and decomposition constantly move carbon between these reservoirs. Carbon enters, is stored, and leaves the different spheres of the Earth through different methods, and in different quantities:

Modeling the Carbon Cycle

The carbon reduction cycle is known as the Calvin cycle, ..

As a result of population growth and economic development, humans have altered the carbon cycle by increasing the concentration of greenhouse gases in the atmosphere. The principal human activities responsible for this change are the combustion of fossil fuels, which emits carbon dioxide, and removing forests that would otherwise absorb carbon dioxide from the atmosphere. Since the Industrial Revolution, levels of greenhouse gases and average temperatures have increased in tandem. From 1990 to 2013, the total warming effect from greenhouse gases added by humans to the Earth’s atmosphere increased by 34 percent. In fact, the pace of climate change is accelerating. Each of the last 3 decades has been successively warmer at the Earth’s surface than any preceding decade since 1850.

The carbon is said to be

Carbon Cycling Through Photosynthesis and Respiration ..

Green plants remove carbon dioxide from the atmosphere by photosynthesis. Living organisms - including all plants and animals - release energy from their food using respiration. Respiration and combustion - burning - both release carbon dioxide into the atmosphere.