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This reduces flood damage, and thereby,protects our lives.



Every living creature needs food or energy to survive. Some depend on others for food and energy, whiles others can produce their own food.

Plants make their own food, glucose, in a process called photosynthesis. We say that plants can photosynthesise.

Photosynthesis and respiration go hand in hand. The result of photosynthesis is glucose, which is stored as chemical energy in the plant cells.
This stored chemical energy comes from the conversion of inorganic carbon (carbon dioxide) into organic carbon. Respiration releases the stored chemical energy.


Other products ofphotosynthesis are formed by incorporating mineral elements into theprocess.

The soil is composed of many different sized particles. With this simple experiment you can separate the main components of the soil and evaluate their proportions.
1 - Go into a field an collect a sample of soil. Put it in a jar of water. Stir it well and let it settle. Observe and describe the different layers of materials.
2 - In water, particles settle more quickly the bigger they are. It is possible to use this property to determine the amount of each component of the soil. Put 3 parts water and 1 part of soil in the container (try 1 cup soil and three cups of water in a quart jar); shake the container for 5 minutes and let the material set. With reference to the figure 1, after 40 seconds measure the thickness of sediment. Call this A; after 30 minutes measure again and call this B; after 24 hours measure C. Now, by subtraction, you can determine the thickness of the main layers: C-B = layer of clay, B-A = layer of silt, A = layer of gravel and sand. Using a sieve with 2 mm holes (less than 1/8 inches), you can separate the gravel from the sand and determine their ratio. On the basis of these data, calculate the content (%) of each component of the soil sample.
3 - Repeat the same experiment with soil collected in other places or that have a different geological origin (i.e: meadow, wood, river bank) or anyplace the soil has a different consistency or texture (i.e: muddy, sandy). Describe the composition of each soil and try to explain the differences. You can also apply this technique to evaluate the composition of the soil for a potted plant, and correct it. Example: if water doesn't drain well, would more sand help? If it needs to hold water longer would clay or organic matter be helpful?
4 - With a microscope, measure the size of the particles. With a clock, measure the time to drop to the bottom of a jar of water. time of the particles in water as a verses their size. Then graph with the Y-axis for the size of the particle and X-axis the time to fall.
Soil and Environment Activities
Soil description and classification
Internet keywords: soil sedimentation test.

Photosynthesis is the procedure all plants go through to make food.

Background Knowledge: Photosynthesis is the process by which plants make their own food.

By 1796, after further research, Ingenhousz was able to write the first equation for photosynthesis, which was:



Light is not directly usable in photosynthesis.

The chemical equation of photosynthesis is: [IMAGE]6CO2 + 6H20 C6 H12 O6 + 6O2 it has been proven many times that plants need light to be able to photosynthesize , so you can say that without light the plant would neither photosynthesize or survive....

- Science and Nature:Living Things:Biology:Fungi

The chemical equation is written below which summarizes the chemical reactions of photosynthesis.

The process is summarized below.





Photosynthesis takes place only in green plant parts such as leaves and some stems, not in roots.

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Air ions are essential to the health of all living things.

Photosynthesis is actually much more complex than what is represented by the equation below.
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and water-soluble sugars are the products of photosynthesis.

The process that makes these food chemicals using solar energy is PHOTOSYNTHESIS.
Defined, photosynthesis is: - chemical reactions that convert the radiant energy of sunlight to chemical energy of sugars.





Photosynthesis is a very complex process.

Living things need energy to survive and function

The protein matterincludes some of the enzymes and coenzymes used in the photosyntheticprocess; the lipid portion contains two types of chlorophyll, alongwith other pigments that assist in absorbing light energy.

are the products of photosynthesis

The glyceraldehydes 3 phosphate molecules that have exited the cycle are then used to make larger carbohydrates.

Photosynthesis is a process that occurs everyday, without us even knowing it.

Photosynthesis is the process by which plants, ..

The Amazon rainforest, alone, produces 20-30 percent of the total oxygen on the planet.

The fact is that photosynthesis plays a crucial role in making the Earth the only planet with life.

and the products of photosynthesis, ..

Priestley concluded that the plants were restoring the air that had been "injured" by the candle or mouse.



History of Photosynthesis Research
In 1779, a Dutch physician named Jan Ingenhousz discovered that submerged willow sprigs produced oxygen gas only in the presence of sunlight.

photosynthesis is used just for the production of energy, ..

Plants, being the only producers, have a crucial role to play in any food chain.

Photosynthesis is vital to facilitate the process of respiration in both, humans and animals, as our oxygen requirements are fulfilled by the oxygen which is produced during this process.

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